unity-support-test crashes on get_opengl_version()

Bug is frequently reported on error.ubuntu.com. Looks like a pathway with uninitialized variables can be triggered under some circumstances.

#0 get_opengl_version (minor=0xbfdb3608, major=0xbfdb3604, version=0x1 <Address 0x1 out of bounds>) at unity_support_test.c:140
        tmp = 0
        i = 0
#1 main (argc=3, argv=0xbfdb36f4) at unity_support_test.c:760
        display_name = <optimized out>
        screen = <optimized out>
        print = <optimized out>
        root = 149729288
        vinfos = 0x8ed51e0
        display = 0x8ecb008
        context = 0x0
        results = {vendor = 0x0, renderer = 0xffffffff <Address 0xffffffff out of bounds>, version = 0x1 <Address 0x1 out of bounds>, result = 1, major = -1218692328, minor = -1076147649, indirect = 0, compiz = 0, flags = 0, error = 0x8ee0ec8 "OpenGL rendering is not supported by the root visual"}
        resultfilename = "\004\b\344\063Z\267\003\000\000\000\000\300\004\b\"\240\004\b\003\000\000\000\364\066\333\277\004\067\333\277"
        resultfile = 0
        forcecheck = <optimized out>
        glx_supported = <optimized out>
        dummy0 = 169
        dummy1 = 105