patch 8.2.1171: possible crash when out of memory

Problem:    Possible crash when out of memory.
Solution:   Check for NULL pointer. (Dominique Pellé, closes #6432)
diff --git a/src/version.c b/src/version.c
index 73d4560..c13f7f1 100644
--- a/src/version.c
+++ b/src/version.c
@@ -755,6 +755,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1171,
+/**/
     1170,
 /**/
     1169,