coverity: fixed unchecked return value

rdp/rdp_mcs.c

@@ -19,6 +19,7 @@
  */
 
 #include "rdp.h"
+#include "common/log.h"
 
 /*****************************************************************************/
 struct rdp_mcs *APP_CC
@@ -598,7 +599,8 @@ failed"));
 int APP_CC
 rdp_mcs_init(struct rdp_mcs *self, struct stream *s)
 {
-    rdp_iso_init(self->iso_layer, s);
+    if (rdp_iso_init(self->iso_layer, s))
+        log_message(LOG_LEVEL_ERROR, "rdp_mcs.c: rdp_iso_init() failed");
     s_push_layer(s, mcs_hdr, 8);
     return 0;
 }

sesman/chansrv/chansrv.c

@@ -812,7 +812,8 @@ my_api_trans_data_in(struct trans *trans)
             in_uint8s(s, 12);
             in_uint32_le(s, bytes_read);
             init_stream(s, bytes_read);
-            trans_force_read(trans, bytes_read);
+            if (trans_force_read(trans, bytes_read))
+                log_message(LOG_LEVEL_ERROR, "chansrv.c: error reading from transport");
         }
         else if (g_tcp_select(trans->sck, 0) & 1)
         {

sesman/chansrv/sound.c

@@ -1132,7 +1132,8 @@ sound_sndsrvr_source_data_in(struct trans *trans)
         return 1;
 
     ts = trans_get_in_s(trans);
-    trans_force_read(trans, 3);
+    if (trans_force_read(trans, 3))
+        log_message(LOG_LEVEL_ERROR, "sound.c: error reading from transport");
 
     ts->p = ts->data + 8;
     in_uint8(ts, cmd);

sesman/sesman.c

@@ -361,7 +361,11 @@ main(int argc, char **argv)
     /* make sure the /tmp/.X11-unix directory exist */
     if (!g_directory_exist("/tmp/.X11-unix"))
     {
-        g_create_dir("/tmp/.X11-unix");
+        if (!g_create_dir("/tmp/.X11-unix"))
+        {
+            log_message(LOG_LEVEL_ERROR,
+                "sesman.c: error creating dir /tmp/.X11-unix");
+        }
         g_chmod_hex("/tmp/.X11-unix", 0x1777);
     }