[PATCH] Fix `unused-result' warnings.

[Jonas Ådahl]

Signed-off-by: Jonas Ådahl <jadahl at gmail.com>
---

This fixes all warnings using gcc 4.6.1.

 clients/dnd.c         |    4 +++-
 clients/window.c      |    4 +++-
 shared/image-loader.c |   17 +++++++++--------
 3 files changed, 15 insertions(+), 10 deletions(-)

diff --git a/clients/dnd.c b/clients/dnd.c
index e3d3c34..8e67dc4 100644
--- a/clients/dnd.c
+++ b/clients/dnd.c
@@ -272,7 +272,9 @@ data_source_send(void *data, struct wl_data_source *source,
 	dnd_flower_message.x_offset = dnd_drag->x_offset;
 	dnd_flower_message.y_offset = dnd_drag->y_offset;
 
-	write(fd, &dnd_flower_message, sizeof dnd_flower_message);
+	if (write(fd, &dnd_flower_message, sizeof dnd_flower_message) < 0)
+		abort();
+
 	close(fd);
 }
 
diff --git a/clients/window.c b/clients/window.c
index 74ddedd..e3959c1 100644
--- a/clients/window.c
+++ b/clients/window.c
@@ -1934,7 +1934,9 @@ data_offer_receive_data(struct data_offer *offer, const char *mime_type,
 {
 	int p[2];
 
-	pipe2(p, O_CLOEXEC);
+	if (pipe2(p, O_CLOEXEC) == -1)
+		return;
+
 	wl_data_offer_receive(offer->offer, mime_type, p[1]);
 	close(p[1]);
 
diff --git a/shared/image-loader.c b/shared/image-loader.c
index 98cc431..b18eb97 100644
--- a/shared/image-loader.c
+++ b/shared/image-loader.c
@@ -157,7 +157,7 @@ read_func(png_structp png, png_bytep data, png_size_t size)
 {
 	FILE *fp = png_get_io_ptr(png);
 
-	if (fread(data, 1, size, fp) < 0)
+	if (fread(data, 1, size, fp) != size)
 		png_error(png, NULL);
 }
 
@@ -356,13 +356,14 @@ load_image(const char *filename)
 	if (fp == NULL)
 		return NULL;
 
-	fread(header, sizeof header, 1, fp);
-	rewind(fp);
-	for (i = 0; i < ARRAY_LENGTH(loaders); i++) {
-		if (memcmp(header, loaders[i].header,
-			   loaders[i].header_size) == 0) {
-			image = loaders[i].load(fp);
-			break;
+	if (fread(header, sizeof header, 1, fp) > 0) {
+		rewind(fp);
+		for (i = 0; i < ARRAY_LENGTH(loaders); i++) {
+			if (memcmp(header, loaders[i].header,
+				   loaders[i].header_size) == 0) {
+				image = loaders[i].load(fp);
+				break;
+			}
 		}
 	}
 
-- 
1.7.5.4