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zero color images are not valid - catch this earlier on - closes #1568

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This commit is contained in:
Dane Springmeyer 2012-11-08 16:39:31 -05:00
parent 53c5933dbd
commit d0f0f9690f
1 changed files with 1 additions and 1 deletions
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2
src/image_util.cpp
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@ -149,7 +149,7 @@ void handle_png_options(std::string const& type,
if (*colors < 0)
throw ImageWriterException("invalid color parameter: unavailable for true color images");
if (!mapnik::util::string2int(t.substr(2),*colors) || *colors < 0 || *colors > 256)
if (!mapnik::util::string2int(t.substr(2),*colors) || *colors < 1 || *colors > 256)
throw ImageWriterException("invalid color parameter: " + t.substr(2));
}
else if (boost::algorithm::starts_with(t, "t="))