revert 91891, a workaround for PR5514.

llvm-svn: 93077
diff --git a/clang/lib/Frontend/RewriteObjC.cpp b/clang/lib/Frontend/RewriteObjC.cpp
index ee803a3..a75835e 100644
--- a/clang/lib/Frontend/RewriteObjC.cpp
+++ b/clang/lib/Frontend/RewriteObjC.cpp
@@ -4765,8 +4765,7 @@
     Stmts.push_back(S);
   else if (isa<ObjCForCollectionStmt>(S)) {
     Stmts.push_back(S);
-    ++BcLabelCount;
-    ObjCBcLabelNo.push_back(BcLabelCount);
+    ObjCBcLabelNo.push_back(++BcLabelCount);
   }
 
   SourceRange OrigStmtRange = S->getSourceRange();