free on NULL or return without free

[2miksyn]

File: luainpython.c; func: Lua_run
In case eval == false - free(NULL)
In case eval == true and luaL_loadbuffer(LuaState, s, len, "") != 0 - no free(buf)

[greatwolf]

Good catch, it's one of those annoying things with manually managing memory in C with no RAII.

The first case isn't too bad, free(NULL) is okay, will need to fix the second case though.