patch 8.0.0758: possible crash when using a terminal window

Problem:    Possible crash when using a terminal window.
Solution:   Check for NULL pointers. (Yasuhiro Matsumoto, closes #1864)
diff --git a/src/version.c b/src/version.c
index ad2a45d..bfeedcd 100644
--- a/src/version.c
+++ b/src/version.c
@@ -770,6 +770,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    758,
+/**/
     757,
 /**/
     756,