PNG writer claims that it can support Progressive Encoding. When i try to write
a PNG image progressively using the default PNG write param, PNG writer throws
NullPointerException. Progressive mode has been set to MODE_DEFAULT.
 writeParam.canWriteProgressive() returns true. Herewith I have enclosed the
 sample code.

This bug does not occur in any of the previous builds and occurs only in
build 58. This bug occurs on all the platforms. This feature works fine
in previous builds.