acap,aplay/portaudio: print index hint just if numeric

If given by name, the info was that the invalid index was -2, which is
an internal value. The message that a device with given name could not
have been found is already printed.

Author: MartinPulec

src/audio/capture/portaudio.c

@@ -216,12 +216,17 @@ static void * audio_cap_portaudio_init(struct module *parent, const char *cfg)
                                 portaudio_get_device_name(input_device_idx));
 		inputParameters.device = input_device_idx;
                 device_info = Pa_GetDeviceInfo(input_device_idx);
+                if (device_info == NULL) {
+                        MSG(ERROR,
+                            "Couldn't obtain requested portaudio device index "
+                            "%d.\nFollows list of available Portaudio "
+                            "devices.\n",
+                            input_device_idx);
+                        portaudio_print_help(PORTAUDIO_IN, false);
+                }
 	}
 
         if(device_info == NULL) {
-                log_msg(LOG_LEVEL_ERROR, MOD_NAME "Couldn't obtain requested portaudio device index %d.\n"
-                               MOD_NAME "Follows list of available Portaudio devices.\n", input_device_idx);
-                portaudio_print_help(PORTAUDIO_IN, false);
                 free(s);
                 Pa_Terminate();
                 return NULL;

src/audio/playback/portaudio.c

@@ -206,13 +206,17 @@ audio_play_portaudio_init(const struct audio_playback_opts *opts)
         const PaDeviceInfo *device_info = NULL;
         if (output_device_idx >= 0) {
                 device_info = Pa_GetDeviceInfo(output_device_idx);
+                if (device_info == NULL) {
+                        MSG(ERROR,
+                            "Couldn't obtain requested portaudio index %d.\n"
+                            "Follows list of available Portaudio devices.\n",
+                            output_device_idx);
+                        audio_play_portaudio_help(false);
+                }
         } else if (output_device_idx == -1) {
                 device_info = Pa_GetDeviceInfo(Pa_GetDefaultOutputDevice());
         }
         if (device_info == NULL) {
-                log_msg(LOG_LEVEL_ERROR, MOD_NAME "Couldn't obtain requested portaudio index %d.\n"
-                                MOD_NAME "Follows list of available Portaudio devices.\n", output_device_idx);
-                audio_play_portaudio_help(false);
                 Pa_Terminate();
                 free(s);
                 return NULL;