jlnr/gosu — pull request #144 by gbchaosmaster (2012-08-31 17:29:14+00:00)
Title: Fixed ambiguous call to std::abs()

The C standard library requires fabs() to be called for floating point
numbers, while the C++ standard library overloads abs(). The inclusion
of cmath in DrawOpQueue.hpp fixes the error on GCC 4.7.