miscelaneous code for testing purposes

Douglas Andreani cefa4e0c5c libpng: add error handling to non existing file il y a 5 ans
libpng cefa4e0c5c libpng: add error handling to non existing file il y a 5 ans
pthread 1b74b0c461 initial pthread and q_thread_model il y a 5 ans
queue_thread_model ef3e64cec5 changes to output on q_thread_model il y a 5 ans
x11-random 4ebb33954c replace rand() for drand48() on x11-examples/worley=noise il y a 5 ans