Use BORDER_COLOR in functions for drawing lines

This PR fixes inconsistent color of the borders in functions mvwhline & mvwvline.

Was:
![bad](https://f.cloud.github.com/assets/5421954/2241334/0f612b16-9ccc-11e3-8844-45b1d78c95a6.png)

Is:
![good](https://f.cloud.github.com/assets/5421954/2241335/0f61645a-9ccc-11e3-8a73-ea9ee321e794.png)