Checker: random include cleanup.

llvm-svn: 99731
diff --git a/clang/lib/Checker/PointerArithChecker.cpp b/clang/lib/Checker/PointerArithChecker.cpp
index 3d62d0c..ed60c42 100644
--- a/clang/lib/Checker/PointerArithChecker.cpp
+++ b/clang/lib/Checker/PointerArithChecker.cpp
@@ -12,8 +12,9 @@
 //
 //===----------------------------------------------------------------------===//
 
-#include "clang/Checker/PathSensitive/CheckerVisitor.h"
 #include "GRExprEngineInternalChecks.h"
+#include "clang/Checker/BugReporter/BugType.h"
+#include "clang/Checker/PathSensitive/CheckerVisitor.h"
 
 using namespace clang;