Update for LLVM API change to make Small(Ptr)Set::insert return pair<iterator, bool> as per the C++ standard's associative container concept.

llvm-svn: 222335
diff --git a/clang/lib/Analysis/AnalysisDeclContext.cpp b/clang/lib/Analysis/AnalysisDeclContext.cpp
index dd154f4..be66f32 100644
--- a/clang/lib/Analysis/AnalysisDeclContext.cpp
+++ b/clang/lib/Analysis/AnalysisDeclContext.cpp
@@ -481,7 +481,7 @@
     // Non-local variables are also directly modified.
     if (const VarDecl *VD = dyn_cast<VarDecl>(DR->getDecl())) {
       if (!VD->hasLocalStorage()) {
-        if (Visited.insert(VD))
+        if (Visited.insert(VD).second)
           BEVals.push_back(VD, BC);
       }
     }