Bug 1270811 - initialize |current_| in GraphStoreInfo. r=h4writer

MozReview-Commit-ID: JWFHDDr6xWT

--HG--
extra : rebase_source : 3c839f581ecca0f2d675818e79d0841072131d45

js/src/jit/FlowAliasAnalysis.cpp

@@ -80,7 +80,8 @@ class GraphStoreInfo : public TempObject
 
   public:
     explicit GraphStoreInfo(TempAllocator& alloc)
-      : stores_(alloc),
+      : current_(nullptr),
+        stores_(alloc),
         empty_(alloc)
     { }