[Libguestfs] [PATCH] builder: use Filename.check_suffix

[Pino Toscano]

... instead of manually extracting and checking the suffix by ourselves
---
 builder/sources.ml | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/builder/sources.ml b/builder/sources.ml
index fd0b236..016adc4 100644
--- a/builder/sources.ml
+++ b/builder/sources.ml
@@ -87,10 +87,7 @@ let merge_sources current_sources new_sources =
   ) new_sources current_sources
 
 let filter_filenames filename =
-  let suffix = ".conf" in
-  let n = String.length filename in
-  let ns = String.length suffix in
-  n >= ns && String.sub filename (n - ns) ns = suffix
+  Filename.check_suffix filename ".conf"
 
 let read_sources ~prog ~debug =
   let dirs = Paths.xdg_config_dirs ~prog in
-- 
1.8.3.1