Only issue a warning if we failed to map a file, not an assertion. This doesn't violate any built-in assumptions. Bug 317205, r=shaver.

git-svn-id: svn://10.0.0.236/trunk@185032 18797224-902f-48f8-a5cc-f745e15eee43

mozilla/js/src/xpconnect/loader/mozJSComponentLoader.cpp

@@ -1502,7 +1502,7 @@ mozJSComponentLoader::GlobalForLocation(const char *aLocation,
 
         char *buf = NS_STATIC_CAST(char*, PR_MemMap(map, 0, fileSize32));
         if (!buf) {
-            NS_ERROR("Failed to map file");
+            NS_WARNING("Failed to map file");
             return NS_ERROR_FAILURE;
         }