patch 8.1.1385: signed/unsigned compiler warning

Problem:    Signed/unsigned compiler warning.
Solution:   Use STRLEN() instead of strlen().
diff --git a/src/fileio.c b/src/fileio.c
index e41f967..4182d56 100644
--- a/src/fileio.c
+++ b/src/fileio.c
@@ -7198,7 +7198,7 @@
     if (buf == NULL)
 	return FAIL;
     STRNCPY(buf, path, MAXPATHL-5);
-    p = buf + strlen(buf);
+    p = buf + STRLEN(buf);
     MB_PTR_BACK(buf, p);
     if (*p == '\\' || *p == '/')
 	*p = NUL;
diff --git a/src/version.c b/src/version.c
index 678d7e8..a66b7a5 100644
--- a/src/version.c
+++ b/src/version.c
@@ -768,6 +768,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1385,
+/**/
     1384,
 /**/
     1383,