st/nine: Initialize manually cursor structure

Initialize manually the cursor structure fields
for more clarity on its content.

Signed-off-by: Axel Davy <davyaxel0@gmail.com>

src/gallium/state_trackers/nine/device9.c

@@ -331,6 +331,10 @@ NineDevice9_ctor( struct NineDevice9 *This,
     This->cursor.software = FALSE;
     This->cursor.hotspot.x = -1;
     This->cursor.hotspot.y = -1;
+    This->cursor.w = This->cursor.h = 0;
+    This->cursor.visible = FALSE;
+    This->cursor.pos.x = 0;
+    This->cursor.pos.y = 0;
     {
         struct pipe_resource tmpl;
         memset(&tmpl, 0, sizeof(tmpl));