xwayland: don't pass INVALID modifier to EGL
When importing a GBM buffer without an explicit modifier to EGL, don't pass DRM_FORMAT_MOD_INVALID. Instead, omit the modifier.
Fixes: f1572937 ("Use EGL_LINUX_DMA_BUF_EXT to create GBM bo EGLImages")
When importing a GBM buffer without an explicit modifier to EGL, don't pass DRM_FORMAT_MOD_INVALID. Instead, omit the modifier.
Fixes: f1572937 ("Use EGL_LINUX_DMA_BUF_EXT to create GBM bo EGLImages")