cell: added -Wmissing-prototypes

configs/linux-cell

@@ -24,7 +24,8 @@ OPT_FLAGS = -O3
 SDK = /opt/cell/sdk/usr
 
 
-CFLAGS = $(OPT_FLAGS) -Wall -Winline -fPIC -m32 -std=c99 -mabi=altivec -maltivec \
+CFLAGS = $(OPT_FLAGS) -Wall -Winline -Wmissing-prototypes \
+	-fPIC -m32 -std=c99 -mabi=altivec -maltivec \
 	-I. -I$(SDK)/include \
 	-DGALLIUM_CELL -DUSE_XSHM -D_BSD_SOURCE