Pan 0.14.2 Won't Compile

I was trying to build the stable version of Pan from source. When run the 
makefile, I receive the error(s)

gcc -DHAVE_CONFIG_H -I. -I. -I../.. -I../.. -I/usr/local/include/pan -DGNOMELOCALEDIR=\""/usr/local/share/locale"\"  -I/usr/include/gtk-2.0 -I/usr/lib/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/lib/glib-2.0/include -I/usr/include/freetype2 -I/usr/include/libpng12   -pthread -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include   -I/usr/include/libxml2        -g -O2 -I. -c 
msort.c
msort.c: In function ‘msort_with_tmp’:
msort.c:68: error: invalid lvalue in increment
msort.c:69: error: invalid lvalue in increment
msort.c:74: error: invalid lvalue in increment
msort.c:75: error: invalid lvalue in increment

Looking at the source to msort.c, this appears to be occurring in the use of 
an incremented pointer to a pointer. I'm not sure what you're trying to do at 
this point in the code, and as I would expect the stable version to compile 
on its own thought it would be wise to check with the experts on this.

Any ideas why it doesn't compile. I'm on linux and running gcc 4.1.2