decoder/{pcm,dsdiff}: add missing stdio.h include

src/decoder/dsdiff_decoder_plugin.c

@@ -31,6 +31,7 @@
 #include "dsd2pcm/dsd2pcm.h"
 
 #include <unistd.h>
+#include <stdio.h> /* for SEEK_SET, SEEK_CUR */
 
 #undef G_LOG_DOMAIN
 #define G_LOG_DOMAIN "dsdiff"

src/decoder/pcm_decoder_plugin.c

@@ -23,6 +23,7 @@
 
 #include <glib.h>
 #include <unistd.h>
+#include <stdio.h> /* for SEEK_SET */
 
 #undef G_LOG_DOMAIN
 #define G_LOG_DOMAIN "pcm"

src/decoder_thread.c

@@ -37,6 +37,7 @@
 #include <glib.h>
 
 #include <unistd.h>
+#include <stdio.h> /* for SEEK_SET */
 
 #undef G_LOG_DOMAIN
 #define G_LOG_DOMAIN "decoder_thread"