render/egl: fix zero-length VLA
@@ -367,7 +367,7 @@ bool wlr_egl_swap_buffers(struct wlr_egl *egl, EGLSurface surface,
int nrects;
pixman_box32_t *rects =
pixman_region32_rectangles(&flipped_damage, &nrects);
- EGLint egl_damage[4 * nrects];
+ EGLint egl_damage[4 * nrects + 1];
for (int i = 0; i < nrects; ++i) {
egl_damage[4*i] = rects[i].x1;
egl_damage[4*i + 1] = rects[i].y1;
