patch 8.2.4895: buffer overflow with invalid command with composing chars

Problem:    Buffer overflow with invalid command with composing chars.
Solution:   Check that the whole character fits in the buffer.

src/version.c

@@ -746,6 +746,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    4895,
 /**/
     4894,
 /**/