Convert a bunch of sprintf to snprintf calls

This batch is the straightforward set - others are more complex and
need more analysis to determine right size to pass.

Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Reviewed-by: Jeremy Huddleston <jeremyhu@apple.com>

hw/xfree86/os-support/linux/lnx_init.c

@@ -146,7 +146,7 @@ xf86OpenConsole(void)
 
         i=0;
         while (vcs[i] != NULL) {
-            sprintf(vtname, vcs[i], xf86Info.vtno); /* /dev/tty1-64 */
+            snprintf(vtname, sizeof(vtname), vcs[i], xf86Info.vtno); /* /dev/tty1-64 */
      	    if ((xf86Info.consoleFd = open(vtname, O_RDWR|O_NDELAY, 0)) >= 0)
 		break;
             i++;