patch 8.0.0946: using PATH_MAX does not work well on some systems

Problem:    Using PATH_MAX does not work well on some systems.
Solution:   use MAXPATHL instead. (James McCoy, closes #1973)
diff --git a/src/version.c b/src/version.c
index d616e25..f3e5a3a 100644
--- a/src/version.c
+++ b/src/version.c
@@ -770,6 +770,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    946,
+/**/
     945,
 /**/
     944,