Bug 1334079 - prevent memory leak in CreateSession. r=cpearce

MozReview-Commit-ID: 7aaEkFcmiZF

--HG--
extra : rebase_source : e686021eabe8931105d3eae5e7f27f5a76ed21c1

media/gmp-clearkey/0.1/ClearKeySessionManager.cpp

@@ -141,6 +141,7 @@ ClearKeySessionManager::CreateSession(uint32_t aPromiseId,
                            0,
                            message,
                            strlen(message));
+    delete session;
 
     return;
   }