patch 8.0.0346: Vim relies on limits.h to be included indirectly

Problem:    Vim relies on limits.h to be included indirectly, but on Solaris 9
            it may not be. (Ben Fritz)
Solution:   Always include limits.h.
diff --git a/src/version.c b/src/version.c
index 2b08df5..1d23935 100644
--- a/src/version.c
+++ b/src/version.c
@@ -765,6 +765,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    346,
+/**/
     345,
 /**/
     344,