Fix examples compilation warnings.

* best-iso.c: Remove or comment out unused variables.
* sample-afl.c: Remove or comment out unused variables.
* sample-capture.c: Fix signed-unsigned compare issue.
* sample-trigger-capture.c: Fix signed-unsigned compare issue.

examples/best-iso.c

@@ -319,9 +319,9 @@ main(int argc, char **argv) {
 	int	retval, iso, tries;
 	char	buf[20];
 	GPContext *context = sample_create_context();
-        int	fd;
+        /*int	fd;*/
         CameraFile *file;
-        CameraFilePath camera_file_path;
+        /*CameraFilePath camera_file_path;*/
 
 	gp_log_add_func(GP_LOG_ERROR, errordumper, NULL);
 	gp_camera_new(&camera);

examples/sample-afl.c

@@ -131,9 +131,8 @@ recursive_directory(Camera *camera, const char *folder, GPContext *context, int
 
 int main(int argc, char **argv) {
 	Camera		*camera = NULL;
-	int		count, ret, storagecnt;
+	int		ret, storagecnt;
 	CameraStorageInformation	*storageinfo;
-	GPPortInfo	gpinfo;
 	GPPortInfoList	*gpinfolist;
 	GPContext	*context;
 	CameraWidget	*rootwidget;
@@ -141,7 +140,7 @@ int main(int argc, char **argv) {
 	const char	*name;
 	CameraText		summary;
 	CameraFile		*file;
-	CameraFilePath		path;
+	/*CameraFilePath		path;*/
 	CameraList		*list;
 	CameraAbilitiesList      *abilities = NULL;
 

examples/sample-capture.c

@@ -122,7 +122,7 @@ main(int argc, char **argv) {
 	f = fopen("foo2.jpg", "wb");
 	if (f) {
 		retval = fwrite (data, size, 1, f);
-		if (retval != size) {
+		if (retval != (int)size) {
 			printf("  fwrite size %ld, written %d\n", size, retval);
 		}
 		fclose(f);

examples/sample-trigger-capture.c

@@ -42,7 +42,7 @@ wait_event_and_download (Camera *camera, int waittime, GPContext *context) {
 		waittime = 10; /* just drain the event queue */
 
 	while (1) {
-		unsigned int timediff;
+		int timediff;
 
 	        gettimeofday (&curtime, NULL);