Fix memory leak

Author: valeriyvan

lib/DependencyScan/ScanDependencies.cpp

@@ -1094,12 +1094,16 @@ forEachBatchEntry(CompilerInstance &invocationInstance,
       if (subInvoke.parseArgs(args, diags)) {
         invocationInstance.getDiags().diagnose(
             SourceLoc(), diag::scanner_arguments_invalid, entry.arguments);
+        if (localSubInstanceMap)
+          delete subInstanceMap;
         return true;
       }
       std::string InstanceSetupError;
       if (newInstance->setup(subInvoke, InstanceSetupError)) {
         invocationInstance.getDiags().diagnose(
             SourceLoc(), diag::scanner_arguments_invalid, entry.arguments);
+        if (localSubInstanceMap)
+          delete subInstanceMap;
         return true;
       }
       auto mainModuleName = newInstance->getMainModule()->getNameStr();