Make suggestions for mismatched enum arguments to printf/scanf.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@157962 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Analysis/ScanfFormatString.cpp b/lib/Analysis/ScanfFormatString.cpp
index 6bc4adb..066d5d6 100644
--- a/lib/Analysis/ScanfFormatString.cpp
+++ b/lib/Analysis/ScanfFormatString.cpp
@@ -316,6 +316,11 @@
     return false;
 
   QualType PT = QT->getPointeeType();
+
+  // If it's an enum, get its underlying type.
+  if (const EnumType *ETy = QT->getAs<EnumType>())
+    QT = ETy->getDecl()->getIntegerType();
+  
   const BuiltinType *BT = PT->getAs<BuiltinType>();
   if (!BT)
     return false;