Advice about gcc.

* README.win32: Advice about gcc.

	* libgimp/gimp.{c,h,def}: New way to get address of PLUG_IN_INFO
 	to the gimp dll, similar as used by the EMX port. Much cleaner.
	Works well with gcc also now.

	* app/gimprc.c: Remove gratuituous printf.

	* app/makefile.msc: Update with new files.

	* plug-ins/makefile.msc: Small updates.

	* plug-ins/makefile.cygwin: New file.

	* plug-ins/gfig/gfig.c
	* plug-ins/script-fu/script-fu-scripts.c: Include <glib.h> early.

plug-ins/script-fu/script-fu-interface.c

@@ -18,6 +18,8 @@
 
 #include "config.h"
 
+#include <glib.h>		/* Include early for obscure Win32
+				   build reasons */
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>