Fix bug with multiple EmitCode() calls due to missing braces.

In short, we were inadvertently trying to emit each function's
code a second time if the function had a mask check at the start
of it.  StmtList::EmitCode() was covering this error up by
not emitting code if the current basic block is NULL.

func.cpp

@@ -334,12 +334,13 @@ Function::emitCode(FunctionEmitContext *ctx, llvm::Function *function,
             if (ctx->GetCurrentBasicBlock())
                 ctx->ReturnInst();
         }
-        else
+        else {
             // Set up basic blocks for goto targets
             ctx->InitializeLabelMap(code);
             // No check, just emit the code
             code->EmitCode(ctx);
         }
+    }
 
     if (ctx->GetCurrentBasicBlock()) {
         // FIXME: We'd like to issue a warning if we've reached the end of