simpleaudio: read returns ssize_t to allow for -1

src/simpleaudio-pulse.c

@@ -16,7 +16,7 @@
  */
 
 
-static size_t
+static ssize_t
 sa_pulse_read( simpleaudio *sa, float *buf, size_t nframes )
 {
     int error;

src/simpleaudio-sndfile.c

@@ -14,7 +14,7 @@
  */
 
 
-static size_t
+static ssize_t
 sa_sndfile_read( simpleaudio *sa, float *buf, size_t nframes )
 {
     SNDFILE *s = (SNDFILE *)sa->backend_handle;

src/simpleaudio.c

@@ -14,7 +14,7 @@ simpleaudio_get_channels( simpleaudio *sa )
     return sa->channels;
 }
 
-size_t
+ssize_t
 simpleaudio_read( simpleaudio *sa, float *buf, size_t nframes )
 {
     return sa->backend->simpleaudio_read(sa, buf, nframes);

src/simpleaudio.h

@@ -30,7 +30,7 @@ simpleaudio_get_rate( simpleaudio *sa );
 unsigned int
 simpleaudio_get_channels( simpleaudio *sa );
 
-size_t
+ssize_t
 simpleaudio_read( simpleaudio *sa, float *buf, size_t nframes );
 
 void

src/simpleaudio_internal.h

@@ -21,7 +21,7 @@ struct simpleaudio {
 };
 
 struct simpleaudio_backend {
-	size_t
+	ssize_t
 	(*simpleaudio_read)( simpleaudio *sa, float *buf, size_t nframes );
 	void
 	(*simpleaudio_close)( simpleaudio *sa );