vim-patch:9.1.0910: 'messagesopt' does not check max wait time

Problem:  'messagesopt' does not check max wait time
          (after v9.1.0908)
Solution: Check for max wait value
          (Shougo Matsushita)

closes: vim/vim#16183

d9e9f89e0f

Co-authored-by: Shougo Matsushita <Shougo.Matsu@gmail.com>

src/nvim/message.c

@@ -1103,6 +1103,11 @@ int messagesopt_changed(void)
     return FAIL;
   }
 
+  // "wait" must be <= 10000
+  if (messages_wait_new > 10000) {
+    return FAIL;
+  }
+
   msg_flags = messages_flags_new;
   msg_wait = messages_wait_new;
 

src/nvim/options.lua

@@ -5467,6 +5467,7 @@ return {
         		milliseconds so the user has a chance to read the
         		message, use 0 to disable sleep (but then the user may
         		miss an important message).
+        		The maximum value is 10000.
 
         history:{n}	Determines how many entries are remembered in the
         		|:messages| history.  The maximum value is 10000.