Bug 709747: Fix COMPtr logging for .forget(). r=dbaron

xpcom/glue/nsCOMPtr.h

@@ -742,6 +742,7 @@ class nsCOMPtr MOZ_FINAL
           // of T.
         {
           NS_ASSERTION(rhs, "Null pointer passed to forget!");
+          NSCAP_LOG_RELEASE(this, mRawPtr);
           *rhs = get();
           mRawPtr = 0;
         }
@@ -1046,6 +1047,7 @@ class nsCOMPtr<nsISupports>
           // parameters.
         {
           NS_ASSERTION(rhs, "Null pointer passed to forget!");
+          NSCAP_LOG_RELEASE(this, mRawPtr);
           *rhs = 0;
           swap(*rhs);
         }