bearer-mbim: fix several leaked 'MbimMessage' objects

mbim_device_command_finish() returns always a new reference to the response.

src/mm-bearer-mbim.c

@@ -404,6 +404,9 @@ ip_configuration_query_ready (MbimDevice *device,
         g_free (ipv6dnsserver);
     }
 
+    if (response)
+        mbim_message_unref (response);
+
     if (error) {
         g_simple_async_result_take_error (ctx->result, error);
         connect_context_complete_and_free (ctx);
@@ -462,6 +465,9 @@ connect_set_ready (MbimDevice *device,
         }
     }
 
+    if (response)
+        mbim_message_unref (response);
+
     if (error) {
         g_simple_async_result_take_error (ctx->result, error);
         connect_context_complete_and_free (ctx);
@@ -515,6 +521,9 @@ provisioned_contexts_query_ready (MbimDevice *device,
         g_error_free (error);
     }
 
+    if (response)
+        mbim_message_unref (response);
+
     /* Keep on */
     ctx->step++;
     connect_context_step (ctx);
@@ -571,6 +580,9 @@ packet_service_set_ready (MbimDevice *device,
         }
     }
 
+    if (response)
+        mbim_message_unref (response);
+
     if (error) {
         /* Don't make NoDeviceSupport errors fatal; just try to keep on the
          * connection sequence even with this error. */
@@ -956,6 +968,9 @@ disconnect_set_ready (MbimDevice *device,
         }
     }
 
+    if (response)
+        mbim_message_unref (response);
+
     if (error) {
         g_simple_async_result_take_error (ctx->result, error);
         disconnect_context_complete_and_free (ctx);