Revert "is this really wasm problem ?"

This reverts commit eb3319b.

Author: BrzVlad

src/mono/mono/mini/interp/interp.c

@@ -989,8 +989,6 @@ static void
 stackval_to_data_sign_ext (MonoType *type, stackval *val, void *data, gboolean pinvoke)
 {
 	switch (type->type) {
-// Wasm problem ???
-#ifndef TARGET_WASM
 		case MONO_TYPE_I1: {
 			mono_i *p = (mono_i*)data;
 			*p = (mono_i)((gint8)val->data.i);
@@ -1022,7 +1020,6 @@ stackval_to_data_sign_ext (MonoType *type, stackval *val, void *data, gboolean p
 			*p = (mono_u)((guint32)val->data.i);
 			break;
 		}
-#endif
 #endif
 		default:
 			stackval_to_data (type, val, data, pinvoke);