test/Makefile.os2: add warning switches to CFLAGS.
diff --git a/test/Makefile.os2 b/test/Makefile.os2
index 922dffa..b85c52c 100644
--- a/test/Makefile.os2
+++ b/test/Makefile.os2
@@ -45,6 +45,7 @@ all: $(TARGETS)
INCPATH = -I$(%WATCOM)/h/os2 -I$(%WATCOM)/h -I../include
CFLAGS = $(INCPATH) -bt=os2 -d0 -q -bm -5s -fp5 -fpi87 -sg -oteanbmier -ei
+CFLAGS+= -wx -wcd=303
LIBPATH = ..
LIBS = SDL2.lib $(TESTLIB)