The checks for NA_INTEGER are unnecessary. The value of NA_INTEGER is…#63

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jtoloe wants to merge 1 commit intor-lib:masterfrom jtoloe:naintegerfix

Commits on Mar 21, 2016

The checks for NA_INTEGER are unnecessary. The value of NA_INTEGER is a valid colour (r-lib#80 ). NA values for colour have already been converted to completely transparent white (#ffffff00) before …
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