fix threads from freezing up just because pthread_create_thread() had errors. need to return the thread stack to the linked list of thread stacks.
fix threads from freezing up just because
pthread_create_thread() had errors. need
to return the thread stack to the linked list
of thread stacks.

gigablast/open-source-search-engine,gigablast/open-source-search-engine,gigablast/open-source-search-engine,gigablast/open-source-search-engine,gigablast/open-source-search-engine,gigablast/open-source-search-engine,gigablast/open-source-search-engine