patch 9.0.1587: Corn config files are not recognized

Problem:    Corn config files are not recognized.
Solution:   Add a pattern for Corn config files. (Jake Stanger, closes #12449)
diff --git a/src/version.c b/src/version.c
index fdb7716..08c67bb 100644
--- a/src/version.c
+++ b/src/version.c
@@ -696,6 +696,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1587,
+/**/
     1586,
 /**/
     1585,