fixes issue 1072
fixes issue 1072

Handle inaccurate missed inner libc alloc detection by allowing it, marking
the outer, and removing the inner when the outer is removed.

SVN-Revision: 1095

sigma-random/drmemory,LohithBlaze/drmemory,sigma-random/drmemory,code4bones/drmemory,LohithBlaze/drmemory,LohithBlaze/drmemory,sigma-random/drmemory,code4bones/drmemory,LohithBlaze/drmemory,code4bones/drmemory,sigma-random/drmemory,code4bones/drmemory,code4bones/drmemory,LohithBlaze/drmemory,sigma-random/drmemory