patch 8.1.1898: crash when out of memory during startup

Problem:    Crash when out of memory during startup.
Solution:   When out of memory message given during initialisation bail out.
            (closes #4842)
diff --git a/src/version.c b/src/version.c
index 14a9528..0689e03 100644
--- a/src/version.c
+++ b/src/version.c
@@ -766,6 +766,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1898,
+/**/
     1897,
 /**/
     1896,