Make sure to use SDL_CFLAGS everywhere we include SDL headers

Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>

Makefile

@@ -208,7 +208,7 @@ keymaps.o: keymaps.c keymaps.h
 
 sdl.o: sdl.c keymaps.h sdl_keysym.h
 
-sdl.o audio/sdlaudio.o: CFLAGS += $(SDL_CFLAGS)
+sdl.o audio/sdlaudio.o baum.o: CFLAGS += $(SDL_CFLAGS)
 
 acl.o: acl.h acl.c
 

Makefile.target

@@ -730,6 +730,8 @@ LDFLAGS+=-p
 main.o: CFLAGS+=-p
 endif
 
+vl.o: CFLAGS+=$(SDL_CFLAGS)
+
 vl.o: qemu-options.h
 
 monitor.o: qemu-monitor.h