Makefile.os2: disable W303 (add -wcd=303 to CFLAGS) newer OpenWatcom versions enable W303 by default. without this, we get multiple "Parameter '%s' has been defined, but not referenced" warnings.
diff --git a/Makefile.os2 b/Makefile.os2
index 659d59f..f7b5005 100644
--- a/Makefile.os2
+++ b/Makefile.os2
@@ -20,6 +20,8 @@ LIBS = mmpm2.lib libuls.lib libconv.lib $(LIBM)
CFLAGS = -bt=os2 -d0 -q -bm -5s -fp5 -fpi87 -sg -oteanbmier -ei
# max warnings:
CFLAGS+= -wx
+# newer OpenWatcom versions enable W303 by default
+CFLAGS+= -wcd=303
# building dll:
CFLAGS+= -bd
# the include paths :