Add a bug category for NSError** checks.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@56394 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Analysis/CheckNSError.cpp b/lib/Analysis/CheckNSError.cpp
index 25f610e..d4697aa 100644
--- a/lib/Analysis/CheckNSError.cpp
+++ b/lib/Analysis/CheckNSError.cpp
@@ -47,6 +47,7 @@
   void EmitWarnings(BugReporter& BR) { EmitGRWarnings(cast<GRBugReporter>(BR));}
   const char* getName() const { return "NSError** null dereference"; }
   const char* getDescription() const { return desc; }
+  const char* getCategory() const { return "Coding Conventions (Apple)"; }
 };  
   
 } // end anonymous namespace
@@ -79,6 +80,7 @@
   
   if (ResultTy == Ctx.VoidTy) {
     BR.EmitBasicReport("Bad return type when passing NSError**",
+              getCategory(),
               "Method accepting NSError** argument should have "
               "non-void return value to indicate that an error occurred.",
               CodeDecl.getLocation());