staging: rtl8723au: Add -Wtype-limits to CFLAGS

Signed-off-by: Jes Sorensen <Jes.Sorensen@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/staging/rtl8723au/Makefile b/drivers/staging/rtl8723au/Makefile
index f85f4b38..f0615d6 100644
--- a/drivers/staging/rtl8723au/Makefile
+++ b/drivers/staging/rtl8723au/Makefile
@@ -53,4 +53,4 @@
 
 obj-$(CONFIG_R8723AU)	:= r8723au.o
 
-ccflags-y += -D__CHECK_ENDIAN__ -I$(src)/include
+ccflags-y += -Wtype-limits -D__CHECK_ENDIAN__ -I$(src)/include