when doing signal functions (like sigaction) make sure it wasn't interrupted by a signal (errno==EINTR)

git-svn-id: https://svn.musicpd.org/mpd/trunk@729 09075e82-0dd4-0310-85a5-a0d7c8717e4f

src/player.h

@@ -79,6 +79,8 @@ typedef struct _PlayerControl {
 	volatile int decode_pid;
 } PlayerControl;
 
+void clearPlayerPid();
+
 void player_sigChldHandler(int pid, int status);
 
 int playerPlay(FILE * fp, char * utf8file);