use G_OPT_C_BG (https://trac.osgeo.org/grass/ticket/2409)

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@62907 15284696-431f-4ddb-bdfa-cd5b030d7da7

vector/v.label/main.c

@@ -183,8 +183,6 @@ int main(int argc, char **argv)
     Hwidth->guisection = _("Effects");
 
     Bcolor = G_define_standard_option(G_OPT_C_BG);
-    Bcolor->key = "background";
-    Bcolor->label = _("Background color");
     Bcolor->answer = "none";
     Bcolor->guisection = _("Colors");
 

vector/v.lrs/v.lrs.label/main.c

@@ -224,10 +224,7 @@ int main(int argc, char **argv)
     Hwidth->answer = "0";
     Hwidth->options = "0-100";
 
-    Bcolor = G_define_option();
-    Bcolor->key = "background";
-    Bcolor->description = _("Background color");
-    Bcolor->type = TYPE_STRING;
+    Bcolor = G_define_standard_option(G_OPT_C_BG);
     Bcolor->answer = "none";
     Bcolor->options =
 	"none,aqua,black,blue,brown,cyan,gray,green,grey,indigo,magenta,"