make mk-udev-hwdb respect input with more than 4 hex digits

.SRCINFO

@@ -1,7 +1,7 @@
 pkgbase = brscan4
 	pkgdesc = SANE drivers from Brother for compatible models
 	pkgver = 0.4.11_1
-	pkgrel = 2
+	pkgrel = 3
 	url = http://support.brother.com
 	install = brscan4.install
 	arch = i686

PKGBUILD

@@ -3,7 +3,7 @@ license=('GPL' 'custom:Brother')
 arch=('i686' 'x86_64')
 pkgname=brscan4
 pkgver=0.4.11_1
-pkgrel=2
+pkgrel=3
 pkgdesc="SANE drivers from Brother for compatible models"
 depends=('sane')
 optdepends=('gtk2: for using brscan_gnetconfig')