using signed return value for read()

diff --git a/src/libstrongswan/plugins/random/random_rng.c b/src/libstrongswan/plugins/random/random_rng.c
index 1aadc88..45a1b51 100644 (file)
--- a/src/libstrongswan/plugins/random/random_rng.c
+++ b/src/libstrongswan/plugins/random/random_rng.c
@@ -63,7 +63,8 @@ struct private_random_rng_t {
 static void get_bytes(private_random_rng_t *this, size_t bytes,
                                          u_int8_t *buffer)
 {
-       size_t done, got;
+       size_t done;
+       ssize_t got;
        
        done = 0;