rolling back the experimental rollbacks in r2178-2179

git-svn-id: http://skia.googlecode.com/svn/trunk@2180 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/utils/SkParse.cpp b/src/utils/SkParse.cpp
index f93e2ef..cb265c3 100644
--- a/src/utils/SkParse.cpp
+++ b/src/utils/SkParse.cpp
@@ -130,7 +130,7 @@
             *value = n;
         return str;
     }
-    return false;
+    return NULL;
 }
 
 const char* SkParse::FindS32(const char str[], int32_t* value)