updated for version 7.4.507
Problem:    Building with MingW and Perl.
Solution:   Remove quotes. (Ken Takata)
diff --git a/src/version.c b/src/version.c
index deaa7b5..329bcd2 100644
--- a/src/version.c
+++ b/src/version.c
@@ -742,6 +742,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    507,
+/**/
     506,
 /**/
     505,