patch 8.0.0545: edit test may fail on some systems

Problem:    Edit test may fail on some systems.
Solution:   If creating a directory with a very long path fails, bail out.
diff --git a/src/version.c b/src/version.c
index 9db3ea0..4d386ee 100644
--- a/src/version.c
+++ b/src/version.c
@@ -765,6 +765,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    545,
+/**/
     544,
 /**/
     543,