Change most sprintf to snprintf.

This also includes vsprintf to vsnprintf.

linux/lnxcon_raw.cpp

@@ -50,7 +50,7 @@ void con_raw_Printf(const char *fmt, ...) {
   char buffer[1024];
   va_list args;
   va_start(args, fmt);
-  vsprintf(buffer, fmt, args);
+  vsnprintf(buffer, sizeof(buffer), fmt, args);
   va_end(args);
   con_raw_Puts(0, buffer);
 }