Bug 1480306: Fix unused variable variable 'hasLineOfContext' in TokenStream.cpp. r=Waldo

MozReview-Commit-ID: EK1IAvCZFwv

--HG--
extra : rebase_source : 8ed430ca01927142f77814a81364c6645c3a2581

js/src/frontend/TokenStream.cpp

@@ -626,7 +626,8 @@ TokenStreamChars<Utf8Unit, AnyCharsAccess>::internalEncodingError(uint8_t releva
 
         TokenStreamAnyChars& anyChars = anyCharsAccess();
 
-        if (bool hasLineOfContext = anyChars.fillExcludingContext(&err, offset)) {
+        bool hasLineOfContext = anyChars.fillExcludingContext(&err, offset);
+        if (hasLineOfContext) {
             if (!internalComputeLineOfContext(&err, offset))
                 break;