patch 8.1.0426: accessing invalid memory in SmcOpenConnection()

Problem:    Accessing invalid memory in SmcOpenConnection().
Solution:   Reduce size of errorstring by one. (Dominique Pelle, closes #3469)
diff --git a/src/version.c b/src/version.c
index 22cc075..480c1ab 100644
--- a/src/version.c
+++ b/src/version.c
@@ -795,6 +795,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    426,
+/**/
     425,
 /**/
     424,