[analyzer] Check that the argument to CFMakeCollectable is non-NULL.

Patch by Sean McBride!

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@167537 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/StaticAnalyzer/Checkers/Checkers.td b/lib/StaticAnalyzer/Checkers/Checkers.td
index b4b40fa..235e633 100644
--- a/lib/StaticAnalyzer/Checkers/Checkers.td
+++ b/lib/StaticAnalyzer/Checkers/Checkers.td
@@ -433,7 +433,7 @@
   DescFile<"BasicObjCFoundationChecks.cpp">;
 
 def CFRetainReleaseChecker : Checker<"CFRetainRelease">,
-  HelpText<"Check for null arguments to CFRetain/CFRelease">,
+  HelpText<"Check for null arguments to CFRetain/CFRelease/CFMakeCollectable">,
   DescFile<"BasicObjCFoundationChecks.cpp">;
 
 def CFErrorChecker : Checker<"CFError">,