patch 9.0.0407: matchstr() does match column offset

Problem:    matchstr() does match column offset. (Yasuhiro Matsumoto)
Solution:   Accept line number zero. (closes #10938)
diff --git a/src/version.c b/src/version.c
index e4b0b09..92fd7e7 100644
--- a/src/version.c
+++ b/src/version.c
@@ -704,6 +704,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    407,
+/**/
     406,
 /**/
     405,