patch 9.1.0566: Stop dir in findfile() doesn't work properly w/o trailing slash

Problem:  Stop directory in findfile() doesn't work properly without a
          trailing slash.
Solution: Always use fnamencmp(), not fnamecmp().

related: #15200
related: #15202

Signed-off-by: zeertzjq <zeertzjq@outlook.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/version.c b/src/version.c
index 9c16d17..4e14bf1 100644
--- a/src/version.c
+++ b/src/version.c
@@ -705,6 +705,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    566,
+/**/
     565,
 /**/
     564,