Error handling, issue #149

[gmcgath]

I've made a small fix to IhdrChunk.java in the PNG module, to address issue #149 . That's the only file I've changed.

[codecov-io]

Codecov Report

Merging #171 into integration will decrease coverage by <.01%.
The diff coverage is 0%.

@@               Coverage Diff                @@
##             integration    #171      +/-   ##
================================================
- Coverage           8.01%   8.01%   -0.01%     
  Complexity           497     497              
================================================
  Files                386     386              
  Lines              31371   31376       +5     
  Branches            6111    6111              
================================================
  Hits                2514    2514              
- Misses             28444   28449       +5     
  Partials             413     413

Impacted Files	Coverage Δ	Complexity Δ
...in/java/com/mcgath/jhove/module/png/IhdrChunk.java	0% <0%> (ø)	0 <0> (ø)	⬇️

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[carlwilson]

@gmcgath this will be merged once the final update build passes.

[carlwilson]

Hi @gmcgath, this seems to be a discrete fix and I'll merge it. Tests would be good :)