Proxy methods don't have GC maps.

Fix regression caused by stack refactoring.

Change-Id: I942b6f34fb4b1f1504466b46e004d4f92f1cb167
diff --git a/src/object.h b/src/object.h
index c1e4667..eeac3ea 100644
--- a/src/object.h
+++ b/src/object.h
@@ -884,7 +884,7 @@
   }
 
   // Is this a CalleSaveMethod or ResolutionMethod and therefore doesn't adhere to normal
-  // conventions for a method of managed code.
+  // conventions for a method of managed code. Returns false for Proxy methods.
   bool IsRuntimeMethod() const {
     return GetDexMethodIndex() == DexFile::kDexNoIndex16;
   }