examples: use exit() instead of pthread_exit() from main thread.

OSX seems to spawn an extra thread for GLUT. As a result, we can't just call
pthread_exit() because there's still one thread left after we kill all the
threads we directly spawned, so the examples never stop running.

Signed-off-by: Drew Fisher <drew.m.fisher@gmail.com>

Author: zarvox

examples/glview.c

@@ -153,7 +153,8 @@ void keyPressed(unsigned char key, int x, int y)
 		free(rgb_back);
 		free(rgb_mid);
 		free(rgb_front);
-		pthread_exit(NULL);
+		// Not pthread_exit because OSX leaves a thread lying around and doesn't exit
+		exit(0);
 	}
 	if (key == 'w') {
 		freenect_angle++;

examples/hiview.c

@@ -178,7 +178,8 @@ void keyPressed(unsigned char key, int x, int y)
 		free(rgb_back);
 		free(rgb_mid);
 		free(rgb_front);
-		pthread_exit(NULL);
+		// Not pthread_exit because OSX leaves a thread lying around and doesn't exit
+		exit(0);
 	}
 	if (key == 'f') {
 		// Cycle through: