patch 8.2.2134: Vim9: get E1099 when autocmd triggered in builtin function

Problem:    Vim9: get E1099 when autocmd triggered in builtin function.
Solution:   Check that did_emsg increased instead of checking that it changed.
            (closes #7448)
diff --git a/src/vim9execute.c b/src/vim9execute.c
index 3f61cb4..351ea8b 100644
--- a/src/vim9execute.c
+++ b/src/vim9execute.c
@@ -583,7 +583,7 @@
     for (idx = 0; idx < argcount; ++idx)
 	clear_tv(&argvars[idx]);
 
-    if (did_emsg != did_emsg_before)
+    if (did_emsg > did_emsg_before)
 	return FAIL;
     return OK;
 }