Warning patrol. r=sparky

js/src/jsobj.cpp

@@ -1890,6 +1890,9 @@ PropDesc::initialize(JSContext* cx, jsid id, const Value &origval)
     bool found;
 
     /* 8.10.5 step 3 */
+#ifdef __GNUC__ /* quell GCC overwarning */
+    found = false;
+#endif
     if (!HasProperty(cx, desc, ATOM_TO_JSID(cx->runtime->atomState.enumerableAtom), &v, &found))
         return false;
     if (found) {

js/src/jsreflect.cpp

@@ -1639,6 +1639,9 @@ ASTSerializer::switchStatement(JSParseNode *pn, Value *dst)
 
     for (JSParseNode *next = listNode->pn_head; next; next = next->pn_next) {
         Value child;
+#ifdef __GNUC__ /* quell GCC overwarning */
+        child = UndefinedValue();
+#endif
         if (!switchCase(next, &child))
             return false;
         JS_ALWAYS_TRUE(cases.append(child)); /* space check above */