vim-patch:8.0.0451: some macros are in lower case

Problem:    Some macros are in lower case.
Solution:   Make a few more macros upper case. Avoid lower case macros use an
            argument twice.
91acfffc1e

src/nvim/message.c

@@ -2935,7 +2935,7 @@ static char_u * console_dialog_alloc(const char_u *message,
     }
 
     // Advance to the next character
-    mb_ptr_adv(r);
+    MB_PTR_ADV(r);
   }
 
   len += (int)(STRLEN(message)
@@ -3053,7 +3053,7 @@ static void copy_hotkeys_and_msg(const char_u *message, char_u *buttons,
     }
 
     // advance to the next character
-    mb_ptr_adv(r);
+    MB_PTR_ADV(r);
   }
 
   *msgp++ = ':';