event_pipe, test: explicitly ignore write() return value

Some compilers are very picky, but we really aren't interested in the
return value.

src/event_pipe.c

@@ -159,5 +159,6 @@ void event_pipe_emit_fast(enum pipe_event event)
 	assert((unsigned)event < PIPE_EVENT_MAX);
 
 	pipe_events[event] = true;
-	(void)write(event_pipe[1], "", 1);
+
+	G_GNUC_UNUSED ssize_t nbytes = write(event_pipe[1], "", 1);
 }

test/read_tags.c

@@ -104,7 +104,7 @@ decoder_data(G_GNUC_UNUSED struct decoder *decoder,
 	     const void *data, size_t datalen,
 	     G_GNUC_UNUSED uint16_t bit_rate)
 {
-	write(1, data, datalen);
+	G_GNUC_UNUSED ssize_t nbytes = write(1, data, datalen);
 	return DECODE_COMMAND_NONE;
 }
 

test/run_convert.c

@@ -115,7 +115,7 @@ int main(int argc, char **argv)
 			return 2;
 		}
 
-		write(1, output, length);
+		G_GNUC_UNUSED ssize_t ignored = write(1, output, length);
 	}
 
 	pcm_convert_deinit(&state);

test/run_decoder.c

@@ -126,7 +126,7 @@ decoder_data(G_GNUC_UNUSED struct decoder *decoder,
 	     const void *data, size_t datalen,
 	     G_GNUC_UNUSED uint16_t kbit_rate)
 {
-	write(1, data, datalen);
+	G_GNUC_UNUSED ssize_t nbytes = write(1, data, datalen);
 	return DECODE_COMMAND_NONE;
 }
 

test/run_encoder.c

@@ -36,8 +36,9 @@ encoder_to_stdout(struct encoder *encoder)
 	size_t length;
 	static char buffer[32768];
 
-	while ((length = encoder_read(encoder, buffer, sizeof(buffer))) > 0)
+	while ((length = encoder_read(encoder, buffer, sizeof(buffer))) > 0) {
-		write(1, buffer, length);
+		G_GNUC_UNUSED ssize_t ignored = write(1, buffer, length);
+	}
 }
 
 int main(int argc, char **argv)

test/run_normalize.c

@@ -65,7 +65,8 @@ int main(int argc, char **argv)
 	while ((nbytes = read(0, buffer, sizeof(buffer))) > 0) {
 		Compressor_Process_int16(compressor,
 					 (int16_t *)buffer, nbytes / 2);
-		write(1, buffer, nbytes);
+
+		G_GNUC_UNUSED ssize_t ignored = write(1, buffer, nbytes);
 	}
 
 	Compressor_delete(compressor);

test/software_volume.c

@@ -65,6 +65,6 @@ int main(int argc, char **argv)
 			return 2;
 		}
 
-		write(1, buffer, nbytes);
+		G_GNUC_UNUSED ssize_t ignored = write(1, buffer, nbytes);
 	}
 }