Fix pixelformat for UVC cameras

src/parse.c

@@ -477,6 +477,7 @@ uvc_create_modes(libmegapixels_camera *camera, int fd)
 					frameinterval.index++;
 					if (frameinterval.type == V4L2_FRMIVAL_TYPE_DISCRETE) {
 						libmegapixels_mode *mode = calloc(1, sizeof(libmegapixels_mode));
+						mode->format = format;
 						mode->v4l_pixfmt = fmtdesc.pixelformat;
 						mode->width = (int) framesize.discrete.width;
 						mode->height = (int) framesize.discrete.height;