Emit an error when attempting to generate IR for SEH __try

Currently we silently omit the code in the try and finally bodies, which
is pretty bad.  This way we fail loudly.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@190809 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CGStmt.cpp b/lib/CodeGen/CGStmt.cpp
index e309540..4492ea9 100644
--- a/lib/CodeGen/CGStmt.cpp
+++ b/lib/CodeGen/CGStmt.cpp
@@ -168,8 +168,9 @@
     break;
   case Stmt::CXXForRangeStmtClass:
     EmitCXXForRangeStmt(cast<CXXForRangeStmt>(*S));
+    break;
   case Stmt::SEHTryStmtClass:
-    // FIXME Not yet implemented
+    EmitSEHTryStmt(cast<SEHTryStmt>(*S));
     break;
   }
 }