v.edit: add --overwrite flag (for `tool=create`)

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@48452 15284696-431f-4ddb-bdfa-cd5b030d7da7

vector/v.edit/main.c

@@ -51,6 +51,7 @@ int main(int argc, char *argv[])
     G_gisinit(argv[0]);
 
     module = G_define_module();
+    module->overwrite = TRUE;
     G_add_keyword(_("vector"));
     G_add_keyword(_("editing"));
     G_add_keyword(_("geometry"));