Change true and false to 1 and 0 in macros that are used to conditionally compile code.

Review URL: http://codereview.appspot.com/4664056/



git-svn-id: http://skia.googlecode.com/svn/trunk@1762 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/gm/gmmain.cpp b/gm/gmmain.cpp
index 78c7fe7..1587a9a 100644
--- a/gm/gmmain.cpp
+++ b/gm/gmmain.cpp
@@ -21,9 +21,9 @@
 
 #ifdef SK_BUILD_FOR_MAC
     #include "SkCGUtils.h"
-    #define CAN_IMAGE_PDF   true
+    #define CAN_IMAGE_PDF   1
 #else
-    #define CAN_IMAGE_PDF   false
+    #define CAN_IMAGE_PDF   0
 #endif
 
 using namespace skiagm;