Streamline Stmt::CollectingStats() and Decl::CollectingStats(). No functionality change.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@90078 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/AST/DeclBase.cpp b/lib/AST/DeclBase.cpp
index f0eb011..7e8579c 100644
--- a/lib/AST/DeclBase.cpp
+++ b/lib/AST/DeclBase.cpp
@@ -55,8 +55,7 @@
 }
 
 bool Decl::CollectingStats(bool Enable) {
-  if (Enable)
-    StatSwitch = true;
+  if (Enable) StatSwitch = true;
   return StatSwitch;
 }