Remove timeout in the main loop

The main loop waits until there is some data to read in file descriptors of
the X server or the pseudo tty. But it uses a timeout in select(), which
causes that st awake each 20 ms, even it doesn't have something to do. This
patch removes this problem removing the timeout, which is not needed.
---
 TODO |    1 -
 st.c |   27 +++------------------------
 2 files changed, 3 insertions(+), 25 deletions(-)

1 files changed, 0 insertions, 1 deletions

diff --git a/TODO b/TODO
index 1996137..c77c105 100644
--- a/TODO
+++ b/TODO
@@ -15,7 +15,6 @@ code & interface
 
 * clean selection code
 * clean and complete terminfo entry
-* remove the timeouts in the main loop
 
 bugs
 ----