Attempt to suppress file not found error

sound.c

@@ -8,7 +8,7 @@
 #include "sound.h"
 #include "config.h"
 #define BITS 8
-
+#include <stdio.h>
 
 void playSound(const char *path) {
     pthread_t pth; //thread identifier
@@ -20,7 +20,7 @@ void playSound(const char *path) {
 
 void *playThreadFunc(void *arg) {
     const char *path = (const char *) arg;
-    
+    if (strlen(path) == 0) return 0; //No input file. Exit.
     mpg123_handle *mh;
     unsigned char *buffer;
     size_t buffer_size;
@@ -43,7 +43,7 @@ void *playThreadFunc(void *arg) {
     buffer = (unsigned char*) malloc(buffer_size * sizeof(unsigned char));
 
     /* open the file and get the decoding format */
-    mpg123_open(mh, path);
+    if (mpg123_open(mh, path) != MPG123_OK) return 0; //File does not exist. exit the function
     mpg123_getformat(mh, &rate, &channels, &encoding);
 
     /* set the output format and open the output device */