fix memory leaks



git-svn-id: http://skia.googlecode.com/svn/trunk@1448 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/forth/ForthParser.h b/forth/ForthParser.h
index 65a39a1..706e95b 100644
--- a/forth/ForthParser.h
+++ b/forth/ForthParser.h
@@ -21,7 +21,8 @@
     void add(const char name[], size_t len, ForthWord* word) {
     //    SkString str(name, len);
     //    SkDebugf("add %s %p\n", str.c_str(), word);
-        (void)fDict.set(name, len, word);
+        SkDEBUGCODE(bool isNewWord = )fDict.set(name, len, word);
+        SkASSERT(isNewWord);
     }
 
     ForthWord* find(const char name[], size_t len) const {