Add clarifying parens.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@86457 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CGExpr.cpp b/lib/CodeGen/CGExpr.cpp
index e489b85..15cb72e 100644
--- a/lib/CodeGen/CGExpr.cpp
+++ b/lib/CodeGen/CGExpr.cpp
@@ -815,7 +815,7 @@
 
 static LValue EmitGlobalVarDeclLValue(CodeGenFunction &CGF,
                                       const Expr *E, const VarDecl *VD) {
-  assert(VD->hasExternalStorage() || VD->isFileVarDecl() &&
+  assert((VD->hasExternalStorage() || VD->isFileVarDecl()) &&
          "Var decl must have external storage or be a file var decl!");
 
   llvm::Value *V = CGF.CGM.GetAddrOfGlobalVar(VD);