cell: fix-up C, CPP flags
Flags like -Wmissing-prototypes don't apply to g++.
diff --git a/configs/linux-cell b/configs/linux-cell
index 016c900..e89a08c 100644
--- a/configs/linux-cell
+++ b/configs/linux-cell
@@ -25,12 +25,16 @@
SDK = /opt/cell/sdk/usr
-CFLAGS = $(OPT_FLAGS) -Wall -Winline -Wmissing-prototypes \
- -fPIC -m32 -std=c99 -mabi=altivec -maltivec \
+
+COMMON_C_CPP_FLAGS = $(OPT_FLAGS) -Wall -Winline \
+ -fPIC -m32 -mabi=altivec -maltivec \
-I. -I$(SDK)/include \
-DGALLIUM_CELL $(DEFINES)
-CXXFLAGS = $(CFLAGS)
+CFLAGS = $(COMMON_C_CPP_FLAGS) -Wmissing-prototypes -std=c99
+
+CXXFLAGS = $(COMMON_C_CPP_FLAGS)
+
# Omitting glw here:
SRC_DIRS = glsl mesa gallium gallium/winsys glu glut/glx glew