clang/Analysis: Fix r174245, a valgrind error in AnalysisDeclContext::getBody(bool &IsAutosynthesized), to initialize IsAutosynthesized explicitly.

llvm-svn: 174303
diff --git a/clang/lib/Analysis/AnalysisDeclContext.cpp b/clang/lib/Analysis/AnalysisDeclContext.cpp
index 20cc3d5..36d1dba 100644
--- a/clang/lib/Analysis/AnalysisDeclContext.cpp
+++ b/clang/lib/Analysis/AnalysisDeclContext.cpp
@@ -87,6 +87,7 @@
 }
 
 Stmt *AnalysisDeclContext::getBody(bool &IsAutosynthesized) const {
+  IsAutosynthesized = false;
   if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
     Stmt *Body = FD->getBody();
     if (!Body && Manager && Manager->synthesizeBodies()) {