patch 9.0.1575: "file N of M" message is not translated

Problem:    "file N of M" message is not translated.
Solution:   Make argument count message translatable. (close #12429)
diff --git a/src/version.c b/src/version.c
index 9ea324f..11e29de 100644
--- a/src/version.c
+++ b/src/version.c
@@ -696,6 +696,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1575,
+/**/
     1574,
 /**/
     1573,