Cannot compile version 1.3.31 - winsock2.h

Hello All,

Compilation of version 1.3.31 with MinGW (gcc 6.3.0, w32api 5.2.1) fails:

libtool: compile:  gcc -static-libgcc -DHAVE_CONFIG_H -I. 
-I../GraphicsMagick-1.3.31 -D_MAGICKLIB_ -I/include -D_DLL -D_MT 
-Ic:/include/freetype2 -Ic:/include/libxml2 -fopenmp -g -O2 -Wall 
-pthread -MT coders/magick_libGraphicsMagick_la-url.lo -MD -MP -MF 
coders/.deps/magick_libGraphicsMagick_la-url.Tpo -c 
../GraphicsMagick-1.3.31/coders/url.c  -DDLL_EXPORT -DPIC -o 
coders/.libs/magick_libGraphicsMagick_la-url.o
In file included from c:/include/libxml2/libxml/nanoftp.h:20:0,
                  from ../GraphicsMagick-1.3.31/coders/url.c:55:
c:\mingw\include\winsock2.h:49:2: error: #error "Including <winsock2.h> 
after <winsock.h> is unsupported."
  #error "Including <winsock2.h> after <winsock.h> is unsupported."
   ^~~~~
c:\mingw\include\winsock2.h:50:2: warning: #warning "Falling back to 
WinSock v1.1 protocol." [-Wcpp]
  #warning "Falling back to WinSock v1.1 protocol."
   ^~~~~~~
make[1]: *** [coders/magick_libGraphicsMagick_la-url.lo] Error 1
make[1]: Leaving directory `/c/GraphicsMagick-1.3.31-build'
make: *** [all] Error 2

Regards,
Test User.