[clang] [CIR] Handle NullStmt (PR #134889)

[Andy Kaylor via cfe-commits]

================
@@ -57,6 +57,7 @@ mlir::LogicalResult CIRGenFunction::emitStmt(const Stmt *s,
 
   switch (s->getStmtClass()) {
   case Stmt::BreakStmtClass:
+  case Stmt::NullStmtClass:
----------------
andykaylor wrote:

Sure. Do you know what code leads to `NoStmtClass`?

https://github.com/llvm/llvm-project/pull/134889