patch 9.0.0959: error when using the "File Settings / Text Width" menu

Problem:    Error when using the "File Settings / Text Width" menu.
Solution:   Use str2nr(). (closes #11624)
diff --git a/src/version.c b/src/version.c
index 115c599..cd6f0b6 100644
--- a/src/version.c
+++ b/src/version.c
@@ -696,6 +696,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    959,
+/**/
     958,
 /**/
     957,