PF_VarString: raise buffer size to 1024. I checked all buffers that the resulting string could end up in, and they're all at least 1024 bytes (even with an unmodified quake client).

PF_VarString is only called on the server, in:
- PF_error, PF_objerror, PF_dprint to print error / debugging messages
- PF_bprint, which calls SV_BroadcastPrintf which copies the string into a 1024-byte buffer, then sends that to clients in a svc_print message
- PF_sprint, which sends the string in a svc_print message using MSG_WriteString (without copying into an intermediate buffer)
- PF_centerprint, which sends the return value of PF_VarString in a svc_centerprint message (without copying into an intermediate buffer)

On the client:
- svc_print reads the payload string with MSG_ReadString (2048-byte buffer), then Con_Printf is called (4096-byte buffer)
- svc_centerprint uses MSG_ReadString then calls SCR_CenterPrint (1024-byte buffer)

I also checked the original quake source and the client-side buffers for MSG_ReadString, Con_Printf, and SCR_CenterPrint are all the same sizes as in QS.

Admittedly I want to support sock's ITS mod, but as far as I can see, it's a totally safe to increase this to 1024.

git-svn-id: svn://svn.code.sf.net/p/quakespasm/code/trunk/quakespasm@985 af15c1b1-3010-417e-b628-4374ebc0bcbd
restore compilability with g++. some whitespace tidy-ups.

git-svn-id: svn://svn.code.sf.net/p/quakespasm/code/trunk/quakespasm@986 af15c1b1-3010-417e-b628-4374ebc0bcbd