Access font after the null check in sceFontGetCharImageRect, not before.
Fix a typo in an if statement comparison in function sceNetAdhocPdpDelete. This was likely intended to check against 'sock', not 'socket'. On Windows, initially 'socket' referred to a function in the WinSock2.h header file. Naturally, this will alway be non-null, which further leads to the conclusion that this was the intended comparison.

Also updated the commented out sections accordingly.
Correctly identify a blockwise memcpy.

Oops, I didn't realize this one went in blocks of 16.
Merge pull request #4927 from unknownbrackets/replace-funcs

Correctly identify a blockwise memcpy
Merge pull request #4923 from lioncash/master

Fix possible null ptr derefs in sceFont.cpp. Also fix typo in if statement comparison in sceNetAdhoc.cpp
Merge pull request #4887 from unknownbrackets/io-minor

Implement a few more ioctl commands
Add basic infrastructure to time io better.

This allows the filesystems to more accurately control timing.
But they're not actually doing it yet (same timing as before.)
Very rough approximation of UMD seek delays.
Remove unused function, oops.
Typo.