pcm_resample: use pcm_buffer (2/2)

Use the PCM buffer library for the libsamplerate output buffer.

src/pcm_resample.c

@@ -17,6 +17,7 @@
  */
 
 #include "pcm_resample.h"
+#include "config.h"
 
 #include <string.h>
 
@@ -24,5 +25,10 @@ void pcm_resample_init(struct pcm_resample_state *state)
 {
 	memset(state, 0, sizeof(*state));
 
+#ifdef HAVE_LIBSAMPLERATE
+	pcm_buffer_init(&state->in);
+	pcm_buffer_init(&state->out);
+#endif
+
 	pcm_buffer_init(&state->buffer);
 }