(svn r1268) -Fix: some warnings in gfx.c fixed

-Fix: Makefile now correctly works for cygwin/mingw; altough defining only cygwin does not compile the game
-Fix: moved SDL information message from severity 0 to 1. Only errors/severe warnings should be level 0

Makefile

@@ -333,15 +333,17 @@ LDFLAGS += -static
 endif
 endif
 
-# If building on Cygwin/MingW don't link with Cygwin libs
+# If building on MingW don't link with Cygwin libs
 ifdef WIN32
-ifdef MINGW
 ifdef CYGWIN
+BASECFLAGS += -mwin32
+LDFLAGS += -mwin32
+endif
+ifdef MINGW
 BASECFLAGS += -mno-cygwin
 LDFLAGS += -mno-cygwin
 endif
 endif
-endif
 
 CFLAGS += $(BASECFLAGS)