Fix non-windows builds unhappy about a missing header.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@229079 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/include/llvm/DebugInfo/PDB/IPDBSession.h b/include/llvm/DebugInfo/PDB/IPDBSession.h
index a36d65fd9add0cb6c753df2bdf07d70909dae00b..bccbdbe8e44a6101aa999104cffc874959e340cd 100644 (file)
--- a/include/llvm/DebugInfo/PDB/IPDBSession.h
+++ b/include/llvm/DebugInfo/PDB/IPDBSession.h
@@ -13,6 +13,7 @@
 #include <memory>
 
 #include "PDBTypes.h"
+#include "llvm/Support/Casting.h"
 
 namespace llvm {