Fix strict aliasing violation in drmHandleEvent

index 228c6e4..cc776c1 100644
@@ -885,10 +885,10 @@ int drmModeCrtcSetGamma(int fd, uint32_t crtc_id, uint32_t size,
 
 int drmHandleEvent(int fd, drmEventContextPtr evctx)
 {
-	char buffer[1024];
-	int len, i;
-	struct drm_event *e;
-	struct drm_event_vblank *vblank;
+	char buffer[1024], *p;
+	int len;
+	struct drm_event e;
+	struct drm_event_vblank vblank;
 
 	/* The DRM read semantics guarantees that we always get only
 	 * complete events. */

@@ -896,39 +896,39 @@ int drmHandleEvent(int fd, drmEventContextPtr evctx)
 	len = read(fd, buffer, sizeof buffer);
 	if (len == 0)
 		return 0;
-	if (len < (int)sizeof *e)
+	if (len < (int)sizeof e)
 		return -1;
 
-	i = 0;
-	while (i < len) {
-		e = (struct drm_event *) &buffer[i];
-		switch (e->type) {
+	p = buffer;
+	while (p < buffer + len) {
+		e = *(struct drm_event *) p;
+		switch (e.type) {
 		case DRM_EVENT_VBLANK:
 			if (evctx->version < 1 ||
 			    evctx->vblank_handler == NULL)
 				break;
-			vblank = (struct drm_event_vblank *) e;
+			vblank = *(struct drm_event_vblank *) p;
 			evctx->vblank_handler(fd,
-					      vblank->sequence,
-					      vblank->tv_sec,
-					      vblank->tv_usec,
-					      U642VOID (vblank->user_data));
+					      vblank.sequence,
+					      vblank.tv_sec,
+					      vblank.tv_usec,
+					      U642VOID (vblank.user_data));
 			break;
 		case DRM_EVENT_FLIP_COMPLETE:
 			if (evctx->version < 2 ||
 			    evctx->page_flip_handler == NULL)
 				break;
-			vblank = (struct drm_event_vblank *) e;
+			vblank = *(struct drm_event_vblank *) p;
 			evctx->page_flip_handler(fd,
-						 vblank->sequence,
-						 vblank->tv_sec,
-						 vblank->tv_usec,
-						 U642VOID (vblank->user_data));
+						 vblank.sequence,
+						 vblank.tv_sec,
+						 vblank.tv_usec,
+						 U642VOID (vblank.user_data));
 			break;
 		default:
 			break;
 		}
-		i += e->length;
+		p += e.length;
 	}
 
 	return 0;