Use more parens to clarify assert.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@187247 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/IR/DebugInfo.cpp b/lib/IR/DebugInfo.cpp
index 5c70a21..58f054c 100644
--- a/lib/IR/DebugInfo.cpp
+++ b/lib/IR/DebugInfo.cpp
@@ -711,7 +711,7 @@
   if (isNameSpace())
     return DINameSpace(DbgNode).getContext();
 
-  assert(isFile() || isCompileUnit() && "Unhandled type of scope.");
+  assert((isFile() || isCompileUnit()) && "Unhandled type of scope.");
   return DIScope();
 }