Change wording of warning about using __bridge casts in non-ARC.

llvm-svn: 150868
diff --git a/clang/lib/Parse/ParseExpr.cpp b/clang/lib/Parse/ParseExpr.cpp
index 75510ad4..fada2e3 100644
--- a/clang/lib/Parse/ParseExpr.cpp
+++ b/clang/lib/Parse/ParseExpr.cpp
@@ -1866,7 +1866,7 @@
     StringRef BridgeCastName = Tok.getName();
     SourceLocation BridgeKeywordLoc = ConsumeToken();
     if (!PP.getSourceManager().isInSystemHeader(BridgeKeywordLoc))
-      Diag(BridgeKeywordLoc, diag::err_arc_bridge_cast_nonarc)
+      Diag(BridgeKeywordLoc, diag::warn_arc_bridge_cast_nonarc)
         << BridgeCastName
         << FixItHint::CreateReplacement(BridgeKeywordLoc, "");
     BridgeCast = false;