patch 8.2.0896: crash when calling searchcount() with a string

Problem:    Crash when calling searchcount() with a string.
Solution:   Check the argument is a dict. (closes #6192)

src/version.c

@@ -746,6 +746,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    896,
 /**/
     895,
 /**/