Fix linking against terminfo on Gentoo

ncurses can be build without a separate tinfo library. This is the
default on Gentoo unless the tinfo USE flag is enabled.
If there is no separate tinfo library, the main curses library needs to
be linked instead.
Fix compiling voglperf32 on non-multiarch systems

For some reason CMake doesn't natively support lib32 paths :/
Fix crash on systems with tuntap interfaces

In voglutils.cpp: getifaddrs() returns a linked list
of network interfaces of type 'struct ifAddrStruct'.
This may include tuntap interfaces of which the ifa->addr is NULL
To replicate this behaviour one can add a tuntap interface like this:
$ sudo ip tuntap add tun99 mode tun
To remove the previously created tuntap interface:
$ sudo ip tuntap del tun99 mode tun
These tuntap devices may be created by VPN software such as
OpenVPN.

To work around this, we simply check whether
ifa->addr is not NULL before proceeding.
Merge pull request #10 from dscharrer/master

Fix linking on Gentoo
Merge pull request #11 from gotschelm/fix_get_ip_addr

Fix crash on systems with tuntap interfaces
Fix name in project file
Hook glXGetProcAddressARB to fix SDL glxspheres.
Link with fake libGL to get DT_NEEDED entry.
Merge pull request #1 from ValveSoftware/master

Merge origin branch 'ValveSoftware/voglperf'