patch 8.0.0466: still macros that should be all-caps

Problem:    There are still a few macros that should be all-caps.
Solution:   Make a few more macros all-caps.
diff --git a/src/userfunc.c b/src/userfunc.c
index 07cc47f..c5ca411 100644
--- a/src/userfunc.c
+++ b/src/userfunc.c
@@ -1494,7 +1494,7 @@
     MSG_PUTS("function ");
     if (fp->uf_name[0] == K_SPECIAL)
     {
-	MSG_PUTS_ATTR("<SNR>", hl_attr(HLF_8));
+	MSG_PUTS_ATTR("<SNR>", HL_ATTR(HLF_8));
 	msg_puts(fp->uf_name + 3);
     }
     else