- further fixes of inccorect overflow errors for int (and long on LLP64 systems)
* prev commit had bugs
* added overflow tests for also int, long, long long (for both, lp64 and llp64)
- while at it, fixing a reference leak when not using python with utf8 caching
9 The FFI supports almost all fundamental C types, multiple calling conventions, symbolic access to foreign C struct/union data types and wrapping of R functions as C callback function pointers.
10 Dynamic bindings to shared C libraries are data-driven by cross-platform binding specification using a compact plain text format ; an initial repository of bindings to a couple of common C libraries (OpenGL, SDL, Expat, glew, CUDA, OpenCL, ODE, R) comes with the package.