patch 8.0.0221: unnecessary condition on PROTO

Problem:    Checking if PROTO is defined inside a function has no effect.
Solution:   Remove the check for PROTO. (Hirohito Higashi)

Author: brammool

src/misc1.c

@@ -2180,7 +2180,7 @@ ins_char(int c)
     char_u	buf[MB_MAXBYTES + 1];
     int		n = 1;
 
-#if defined(FEAT_MBYTE) || defined(PROTO)
+#ifdef FEAT_MBYTE
     n = (*mb_char2bytes)(c, buf);
 
     /* When "c" is 0x100, 0x200, etc. we don't want to insert a NUL byte.

src/version.c

@@ -764,6 +764,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    221,
 /**/
     220,
 /**/