Fix win32 dedicated input line printing to backlog

Use to write win32 input line using WriteConsole then overwrite by
CON_Print, so when CON_Print removes color format characters the end of original input line was visable.

"hi ^1guys" use to be shown as "hi guysys" in the console backlog.
Don't look for colors past win32 input line length
#5866: Fix surface culling through portals, and use the correct number of frustum planes.
Fix #5849 - broken snapvector inverts player speed

Snapvector was converting floats to 16 bit integers instead of 32 bit integers.
Merge branch 'master' of https://github.com/ioquake/ioq3