patch 7.4.1334
Problem:    Many compiler warnings with MingW.
Solution:   Add type casts. (Yasuhiro Matsumoto)
diff --git a/src/dosinst.h b/src/dosinst.h
index b33426a..97d83d9 100644
--- a/src/dosinst.h
+++ b/src/dosinst.h
@@ -452,7 +452,7 @@
 /*
  * Append a backslash to "name" if there isn't one yet.
  */
-    static void
+    void
 add_pathsep(char *name)
 {
     int		len = strlen(name);