patch 9.1.0019: cmdline may disappear when changing 'cmdheight'

Problem:  cmdline may disappear when changing 'cmdheight'
          (after Patch 9.0.0190, @markonm)
Solution: always re-calculate the old_p_ch value, not only
          when cmdline_row was higher than expected

fixes: #13822
closes: #13826

Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/version.c b/src/version.c
index 675103f..627acd2 100644
--- a/src/version.c
+++ b/src/version.c
@@ -705,6 +705,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    19,
+/**/
     18,
 /**/
     17,