Add parentheses around `&&` within `||` to avoid compiler warning message.

Summary: The assert code is introduced by r265370.

Reviewers: bkramer

Subscribers: tejohnson

Differential Revision: http://reviews.llvm.org/D18786

llvm-svn: 265383
diff --git a/llvm/lib/IR/ModuleSummaryIndex.cpp b/llvm/lib/IR/ModuleSummaryIndex.cpp
index 340ecca..32415cf 100644
--- a/llvm/lib/IR/ModuleSummaryIndex.cpp
+++ b/llvm/lib/IR/ModuleSummaryIndex.cpp
@@ -74,9 +74,8 @@
                                        bool PerModuleIndex) const {
   auto InfoList = findGlobalValueInfoList(ValueGUID);
   assert(InfoList != end() && "GlobalValue not found in index");
-  assert(!PerModuleIndex ||
-         InfoList->second.size() == 1 &&
-             "Expected a single entry per global value in per-module index");
+  assert((!PerModuleIndex || InfoList->second.size() == 1) &&
+         "Expected a single entry per global value in per-module index");
   auto &Info = InfoList->second[0];
   return Info.get();
 }