patch 8.2.2908: crash when using a terminal popup window from cmdline window

Problem:    Crash when using a terminal popup window from the cmdline window.
Solution:   Instead of checking cmdwin_type call cmdwin_is_active().
            (closes #8286)

src/version.c

@@ -750,6 +750,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2908,
 /**/
     2907,
 /**/