patch 8.2.1913: GTK GUI: rounding for the cell height is too strict

Problem:    GTK GUI: rounding for the cell height is too strict.
Solution:   Round up above 15/16 of a pixel. (closes #7203)
diff --git a/src/version.c b/src/version.c
index adef583..b83bc48 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1913,
+/**/
     1912,
 /**/
     1911,