wxNviz: don't reset light when switching back to 3D view

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@47380 15284696-431f-4ddb-bdfa-cd5b030d7da7

lib/ogsf/GS2.c

@@ -120,8 +120,6 @@ void GS_libinit(void)
     Cxl_func = void_func;
     Swap_func = void_func;
 
-    /* reset lights */
-    Numlights = 0;
     
     if (first) {
 	gs_init();