Bug 1288954 - Only log error if failureId is set. r=jrmuizel

MozReview-Commit-ID: HsjNnHTqaya

--HG--
extra : rebase_source : 17858078f32ecb34146453441bb4f6405c30fcd9

gfx/gl/GLLibraryEGL.cpp

@@ -189,6 +189,10 @@ public:
 
     void logError(const char *errorMessage) override
     {
+        if (!mFailureId) {
+            return;
+        }
+
         nsCString str(errorMessage);
         Tokenizer tokenizer(str);