console/vtxprintf.c: Add required spaces around '>'

Change-Id: I2e1e494f40bf2316e02a96759a92c933ee11fbab
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/26024
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>

src/console/vtxprintf.c

@@ -106,7 +106,7 @@ static int number(void (*tx_byte)(unsigned char byte, void *data),
 		precision = i;
 	size -= precision;
 	if (!(type&(ZEROPAD+LEFT)))
-		while (size-->0)
+		while (size-- > 0)
 			call_tx(' '), count++;
 	if (sign)
 		call_tx(sign), count++;