build with -Wall
fix associated warnings (at least on gcc 4.0.1)



git-svn-id: http://skia.googlecode.com/svn/trunk@129 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/Makefile b/Makefile
index fa88b0a..dc55591 100644
--- a/Makefile
+++ b/Makefile
@@ -3,7 +3,7 @@
 # setup our defaults
 CC := gcc
 C_INCLUDES := -Iinclude/core -Iinclude/effects -Iinclude/images -Iinclude/utils
-CFLAGS := # -O2 
+CFLAGS := -Wall # -O2 
 LINKER_OPTS := -lpthread
 DEFINES := -DSK_CAN_USE_FLOAT
 HIDE = @