patch 8.2.2909: build error with non-Unix system

Problem:    Build error with non-Unix system.
Solution:   Always include limits.h.
diff --git a/src/version.c b/src/version.c
index 4b145f1..2950047 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2909,
+/**/
     2908,
 /**/
     2907,