egl_dri2: Silence warnings about missing initializers

egl_dri2.c: At top level:
egl_dri2.c:325:4: warning: missing initializer [-Wmissing-field-initializers]
egl_dri2.c:325:4: warning: (near initialization for 'swrast_driver_extensions[2].version') [-Wmissing-field-initializers]
egl_dri2.c:330:4: warning: missing initializer [-Wmissing-field-initializers]
egl_dri2.c:330:4: warning: (near initialization for 'swrast_core_extensions[1].version') [-Wmissing-field-initializers]

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
diff --git a/src/egl/drivers/dri2/egl_dri2.c b/src/egl/drivers/dri2/egl_dri2.c
index 4cd2d13..4cd19a1 100644
--- a/src/egl/drivers/dri2/egl_dri2.c
+++ b/src/egl/drivers/dri2/egl_dri2.c
@@ -322,12 +322,12 @@
 static struct dri2_extension_match swrast_driver_extensions[] = {
    { __DRI_CORE, 1, offsetof(struct dri2_egl_display, core) },
    { __DRI_SWRAST, 2, offsetof(struct dri2_egl_display, swrast) },
-   { NULL }
+   { NULL, 0, 0 }
 };
 
 static struct dri2_extension_match swrast_core_extensions[] = {
    { __DRI_TEX_BUFFER, 2, offsetof(struct dri2_egl_display, tex_buffer) },
-   { NULL }
+   { NULL, 0, 0 }
 };
 
 static EGLBoolean