Calling getExtension with empty string results in exception

[Destranix]

When calling glbinding::aux::Meta::getExtension(const std::string & extension) with an empty string an exception is thrown as the function attempts to access the string at a specific index unchecked when trying to skip the prefix.

See:

glbinding/source/glbinding-aux/source/Meta.cpp

Line 97 in 69e75ea

const auto index = alphabeticalGroupIndex(glextension, 3);

glbinding/source/glbinding-aux/source/Meta.cpp

Line 49 in 69e75ea

auto index = static_cast<size_t>(identifier[prefixLength]); // ignore prefix ('GL_' or 'gl')

[scheibel]

Thanks for reporting. I added a couple of lines to fetch these instances.
They're now pushed to master and will be part of the next release.