MDEV-22717: Conditional jump or move depends on uninitialised value(s) in...

MDEV-22717: Conditional jump or move depends on uninitialised value(s) in find_uniq_filename(char*, unsigned long)

Fix:
===
Initialize 'number' variable to '0'.

sql/log.cc

@@ -2431,7 +2431,7 @@ static int find_uniq_filename(char *name, ulong next_log_number)
   char                  buff[FN_REFLEN], ext_buf[FN_REFLEN];
   struct st_my_dir     *dir_info;
   struct fileinfo *file_info;
-  ulong                 max_found, next, number;
+  ulong                 max_found= 0, next= 0, number= 0;
   size_t		buf_length, length;
   char			*start, *end;
   int                   error= 0;
@@ -2457,7 +2457,7 @@ static int find_uniq_filename(char *name, ulong next_log_number)
     if (strncmp(file_info->name, start, length) == 0 &&
 	test_if_number(file_info->name+length, &number,0))
     {
-      set_if_bigger(max_found,(ulong) number);
+      set_if_bigger(max_found, number);
     }
   }
   my_dirend(dir_info);