provide squeezelite error log in UI

components/squeezelite/embedded.c

@@ -17,6 +17,7 @@
 #include "esp_wifi.h"
 #include "monitor.h"
 #include "platform_config.h"
+#include "messaging.h"
 
 mutex_type slimp_mutex;
 static jmp_buf jumpbuf;
@@ -29,6 +30,15 @@ _sig_func_ptr signal(int sig, _sig_func_ptr func) {
 	return NULL;
 }
 
+void em_logprint(const char *fmt, ...) {
+    va_list args;
+	va_start(args, fmt);
+	vfprintf(stderr, fmt, args);    
+    vmessaging_post_message(MESSAGING_ERROR, MESSAGING_CLASS_SYSTEM, fmt, args); 
+	va_end(args);
+	fflush(stderr);
+}
+
 void *audio_calloc(size_t nmemb, size_t size) {
 	return calloc(nmemb, size);
 }
@@ -55,6 +65,7 @@ int embedded_init(void) {
 	mutex_create(slimp_mutex);
 	sb_controls_init();
 	custom_player_id = sb_displayer_init() ? 100 : 101;
+    
     return setjmp(jumpbuf);
 }