Fix for the "Lorem" button. Missing an extern keyword in BIF_editfont.h

(thanks Matthew for spotting this!)

Now it should work even on platforms with sane compilers (unlike gcc) :-)

source/blender/include/BIF_editfont.h

@@ -35,7 +35,7 @@
 
 struct Text;
 
-char *BIF_lorem;
+extern char *BIF_lorem;
 
 void do_textedit(unsigned short event, short val, char _ascii);
 void make_editText(void);