d.linegraph: fix CLI parameter type (width in D_line_width is double not int)

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@72558 15284696-431f-4ddb-bdfa-cd5b030d7da7

display/d.linegraph/main.c

@@ -374,7 +374,7 @@ int main(int argc, char **argv)
     secondary_width_opt = G_define_option();
     secondary_width_opt->key = "secondary_width";
     secondary_width_opt->description = _("Width of point symbol lines");
-    secondary_width_opt->type = TYPE_INTEGER;
+    secondary_width_opt->type = TYPE_DOUBLE;
     secondary_width_opt->required = NO;
     secondary_width_opt->multiple = YES;
     secondary_width_opt->answer = "0.1";