Change clang-tidy-error to brace-related one

Author: aheejin

src/passes/pass.cpp

@@ -701,6 +701,7 @@ int PassRunner::getPassDebug() {
   int testVar = 5;
   if (passDebug > 0)
     testVar = 3;
+  (void)testVar;
   return passDebug;
 }