Seg fault at shutdown with GCC 4.4

[brycelelbach]

[reported by blelbach] [Trac time Wed Nov 2 13:47:47 2011] ```
[13:46:25]:wash@vega:/home/wash/hpx/gcc-4.4.6-release$ bin/fibonacci
fibonacci(10) == 55
elapsed time: 0.00289883 [s]
Received Segmentation fault, 6 frames:
0x7fa756d32862 : hpx::detail::backtrace() + 0x62 in /shared/home/wash/hpx/gcc-4.4.6-release/lib/hpx/libhpx.so.0
0x7fa756c818b8 : hpx::termination_handler(int) + 0x18 in /shared/home/wash/hpx/gcc-4.4.6-release/lib/hpx/libhpx.so.0
0x7fa75470f020 : ??? + 0x5470f020 in /lib/x86_64-linux-gnu/libpthread.so.0
0x7fa754706113 : ??? + 0x54706113 in /lib/x86_64-linux-gnu/libpthread.so.0
0x7fa754706b4e : ??? + 0x54706b4e in /lib/x86_64-linux-gnu/libpthread.so.0
0x7fa75445136d : clone + 0x6d in /lib/x86_64-linux-gnu/libc.so.6
Aborted

Release build, GCC 4.4.6 (Debian), Boost 1.47.0, HPX e57c7321f3d0cd2921dc1bb02e88b41804aa6d1c.