phash.sh: Use int() for the size of the hash table

Pass the hash table size to int() to make it a bit more sane.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>

perllib/phash.ph

@@ -146,7 +146,7 @@ sub gen_perfect_hash($) {
     # Minimal power of 2 value for N with enough wiggle room.
     # The scaling constant must be larger than 0.5 in order for the
     # algorithm to ever terminate.
-    my $room = scalar(@keys)*0.8;
+    my $room = int(scalar(@keys)*0.8);
     $n = 1;
     while ($n < $room) {
 	$n <<= 1;