patch 8.1.1245: ":copen 10" sets height in full-height window

Problem:    ":copen 10" sets height in full-height window. (Daniel Hahler)
Solution:   Don't set the height if the quickfix window is full height.
            (closes #4325)

src/version.c

@@ -767,6 +767,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1245,
 /**/
     1244,
 /**/