examples/async.c: fix sometimes-uninitialized warning

Initialize retval with EXIT_SUCCESS. Otherwise, if there are no errors,
this variable stays uninitialized.

diff --git a/examples/async.c b/examples/async.c
index 241bb7f..4fc9631 100644 (file)
--- a/examples/async.c
+++ b/examples/async.c
@@ -30,7 +30,7 @@ int main(int argc, char **argv)
     struct ftdi_context *ftdi;
     int do_read = 0;
     int do_write = 0;
-    int i, f, retval;
+    int i, f, retval = EXIT_SUCCESS;
 
     if ((ftdi = ftdi_new()) == 0)
     {