[analyzer] Constify a method.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@140091 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Analysis/AnalysisContext.cpp b/lib/Analysis/AnalysisContext.cpp
index 7078e79..200183a 100644
--- a/lib/Analysis/AnalysisContext.cpp
+++ b/lib/Analysis/AnalysisContext.cpp
@@ -68,7 +68,7 @@
   Contexts.clear();
 }
 
-Stmt *AnalysisContext::getBody() {
+Stmt *AnalysisContext::getBody() const {
   if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D))
     return FD->getBody();
   else if (const ObjCMethodDecl *MD = dyn_cast<ObjCMethodDecl>(D))