fix memory leaks



git-svn-id: http://skia.googlecode.com/svn/trunk@1448 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/forth/Forth.cpp b/forth/Forth.cpp
index 01ed204..1df9dd8 100644
--- a/forth/Forth.cpp
+++ b/forth/Forth.cpp
@@ -277,6 +277,11 @@
 }
 
 ForthParser::~ForthParser() {
+    SkTDict<ForthWord*>::Iter iter(fDict);
+    ForthWord* word;
+    while (iter.next(&word)) {
+        delete word;
+    }
 }
 
 static const char* parse_error(const char msg[]) {