Error compiling CinePaint 0.25-0 under Slackware64 13.0

Hello everyone,
I'm trying to compile CinePaint from CVS under Slackware Linux x86_64 
but I'm running into an error. I have installed SlackBuilds of FLTK and 
ftgl and compiled Oyranos and elektra from source.
=================================================================
               Configuration Results

GTK CinePaint Version 0.25.0


General dependencies:
    Gtk2 toolkit                 yes    2.18.7
    DnD support                  yes    X11/Xmu
    littleCMS                    yes    lcms 1.19
    Oyranos                      yes    oyranos 0.1.9

Plug-ins with external dependencies:
    Python plug-in:              no
    OpenEXR plug-in:             yes    OpenEXR 1.6.1
    Tiff plug-in:                yes
    PNG plug-in:                 yes    libpng 1.4.1
    Jpeg plug-in:                yes
    Print plug-in:               yes    Gutenprint 5.2.4
    FLTK dependent plug-ins:     yes    bracketing_to_hdr collect pdf
    Thread dependent plug-ins:   yes    icc_examin
    Flex dependent plug-ins:     yes    iol
=================================================================
  Running make && make install  stops when compiling collect plug-in:
Making all in collect
make[2]: Entering directory 
`/home/mats/cinepaint-project/cinepaint/plug-ins/col 
 
          lect'
g++ -DHAVE_CONFIG_H -I. -I../../lib -I/usr/include/gtk-2.0 
-I/usr/lib64/gtk-2.0/ 
                                                  include 
-I/usr/include/atk-1.0 -I/usr/include/cairo -I/usr/include/pango-1.0 -I/ 
 
                             usr/include/glib-2.0 
-I/usr/lib64/glib-2.0/include -I/usr/include/pixman-1 -I/us 
 
                 r/include/freetype2 -I/usr/include/libpng14 
-INONE/include -I/usr/include/gtk- 
                                                               2.0 
-I/usr/lib64/gtk-2.0/include -I/usr/include/atk-1.0 -I/usr/include/cairo 
-I/ 
                                usr/include/pango-1.0 
-I/usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include -I/u 
 
                sr/include/pixman-1 -I/usr/include/freetype2 
-I/usr/include/libpng14    -I/usr/i 
 
nclude/freetype2  -fPIC -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 
-D_THREAD_SAFE 
                                            -D_REENTRANT -I../.. 
-I/usr/local/include    -g -O2 -MT collect.o -MD -MP -MF . 
 
                deps/collect.Tpo -c -o collect.o collect.cpp
collect.cpp: In function 'void query()':
collect.cpp:104: warning: deprecated conversion from string constant to 
'char*'
collect.cpp:104: warning: deprecated conversion from string constant to 
'char*'
collect.cpp:104: warning: deprecated conversion from string constant to 
'char*'
collect.cpp:104: warning: deprecated conversion from string constant to 
'char*'
collect.cpp:108: warning: deprecated conversion from string constant to 
'char*'
collect.cpp:108: warning: deprecated conversion from string constant to 
'char*'
collect.cpp:122: warning: deprecated conversion from string constant to 
'char*'
collect.cpp:122: warning: deprecated conversion from string constant to 
'char*'
collect.cpp:122: warning: deprecated conversion from string constant to 
'char*'
collect.cpp:122: warning: deprecated conversion from string constant to 
'char*'
collect.cpp:122: warning: deprecated conversion from string constant to 
'char*'
collect.cpp:122: warning: deprecated conversion from string constant to 
'char*'
collect.cpp:122: warning: deprecated conversion from string constant to 
'char*'
collect.cpp:122: warning: deprecated conversion from string constant to 
'char*'
collect.cpp: In function 'void run(char*, int, GParam*, int*, GParam**)':
collect.cpp:155: warning: deprecated conversion from string constant to 
'gchar*'
collect.cpp:194: warning: deprecated conversion from string constant to 
'gchar*'
collect.cpp: In function 'int file_load(const char*, int)':
collect.cpp:210: warning: deprecated conversion from string constant to 
'char*'
collect.cpp: In function 'int do_collect()':
collect.cpp:304: error: invalid conversion from 'const char*' to 'char*'
collect.cpp:304: error:   initializing argument 2 of 'void 
gimp_layer_set_name(g 
                                                  int32, char*)'
collect.cpp:344: error: invalid conversion from 'const char*' to 'char*'
collect.cpp:344: error:   initializing argument 2 of 'void 
gimp_layer_set_name(g 
                                                  int32, char*)'
make[2]: *** [collect.o] Error 1
make[2]: Leaving directory 
`/home/mats/cinepaint-project/cinepaint/plug-ins/coll 
 
           ect'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/home/mats/cinepaint-project/cinepaint/plug-ins'
make: *** [all-recursive] Error 1
bash-4.1#

How do I fix this?

Regards,
Mats Tegner

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