patch 8.1.0910: crash with tricky search pattern

Problem:    Crash with tricky search pattern. (Kuang-che Wu)
Solution:   Check for runnning out of memory. (closes #3950)
diff --git a/src/version.c b/src/version.c
index bc4ae27..59f7b5d 100644
--- a/src/version.c
+++ b/src/version.c
@@ -784,6 +784,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    910,
+/**/
     909,
 /**/
     908,