[8u20] Review request forRT-15619: BMPImageLoader fails to correctly load an image if the input stream read(byte[] b, int off, int len) method happens to return fewer than 'len' bytes

[Vadim Pakhnushev]

Jim,
Please review this very simple addition to the existing test:

https://javafx-jira.kenai.com/browse/RT-15619
http://cr.openjdk.java.net/~vadim/RT-15619/webrev.00/

Thanks,
Vadim