pnp: avoid a small unlikely memory leak in proc_read_escd()

There's a small and unlikely memory leak in
drivers/pnp/pnpbios/proc.c::proc_read_escd().  It's inside a sanity check,
so it probably won't trigger often (if at all), however it *is* a potential
leak and it's easy to avoid, so let's just fix it :)
Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/pnp/pnpbios/proc.c

@@ -94,8 +94,9 @@ static int proc_read_escd(char *buf, char **start, off_t pos,
 
 	/* sanity check */
 	if (escd_size > MAX_SANE_ESCD_SIZE) {
-		printk(KERN_ERR
-		       "PnPBIOS: proc_read_escd: ESCD size reported by BIOS read_escd call is too great\n");
+		printk(KERN_ERR "PnPBIOS: proc_read_escd: ESCD size reported by"
+				" BIOS read_escd call is too great\n");
+		kfree(tmpbuf);
 		return -EFBIG;
 	}