Fix Check_installed function when checking against host

Thanks to jnqnfe for the report.

Closes: #774807

debian/changelog

@@ -34,6 +34,8 @@ live-build (1:20160105) UNRELEASED; urgency=medium
   * Drop an optimization in chroot_archives that has undesired side-effects.
     Thanks to jnqnfe for the patch. Closes: #775989 
   * Drop gpgv and debian-keyring from Suggests.
+  * Fix Check_installed function when checking against host. Thanks to jnqnfe
+    for the report. Closes: #774807
 
   [ Kristian Klausen ]
   * Include ext{3,4} journal size when calculating image size. Closes: #801712

functions/packages.sh

@@ -82,7 +82,7 @@ Check_installed ()
 	else
 		if which dpkg-query > /dev/null 2>&1
 		then
-			if Chroot chroot "dpkg-query -s ${PACKAGE}" 2> /dev/null | grep -qs "Status: install"
+			if dpkg-query -s "${PACKAGE}" 2> /dev/null | grep -qs "Status: install"
 			then
 				INSTALL_STATUS=0
 			else