[patch][debootstrap] small style fixes

[Luca Favatella <slackydeb@gmail.com>]

Hi.

Can you please consider to commit in the attached patch in debootstrap svn?
They are only small style fixes.

Thanks,
Luca Favatella


P.S.
I'm trying to understand debootstrap.
In
http://lists.debian.org/debian-boot/2009/03/msg00370.html
it was suggested to me to "Use [ -z ... ].".

Index: debootstrap
===================================================================
--- debootstrap	(revision 57959)
+++ debootstrap	(working copy)
@@ -9,7 +9,7 @@
 
 ###########################################################################
 
-if [ "$DEBOOTSTRAP_DIR" = "" ]; then
+if [ -z "$DEBOOTSTRAP_DIR" ]; then
 	if [ -x /debootstrap/debootstrap ]; then
 		DEBOOTSTRAP_DIR=/debootstrap
 	else
@@ -96,7 +96,7 @@
 
 ###########################################################################
 
-if [ "$PKGDETAILS" = "" ]; then
+if [ -z "$PKGDETAILS" ]; then
 	error 1 NO_PKGDETAILS "No pkgdetails available; either install perl, or build pkgdetails.c from source"
 fi
 
@@ -299,14 +299,14 @@
 		VARIANT=$(cat $DEBOOTSTRAP_DIR/variant)
 		SUPPORTED_VARIANTS="$VARIANT"
 	fi
-	if [ "$CHROOTDIR" = "" ]; then
+	if [ -z "$CHROOTDIR" ]; then
 		TARGET=/
 	else
 		TARGET=$CHROOTDIR
 	fi
 	SCRIPT=$DEBOOTSTRAP_DIR/suite-script
 else
-	if [ "$1" = "" ] || [ "$2" = "" ]; then
+	if [ -z "$1" ] || [ -z "$2" ]; then
 		usage_err 1 NEEDSUITETARGET "You must specify a suite and a target."
 	fi
 	SUITE="$1"
Index: functions
===================================================================
--- functions	(revision 57959)
+++ functions	(working copy)
@@ -251,7 +251,7 @@
 	fi
 
 	if [ -e "$2" ]; then
-		if [ "$3" = "" ]; then
+		if [ -z "$3" ]; then
 			return 0
 		elif [ "$3" = nocache ]; then
 			rm -f "$2"
@@ -306,7 +306,7 @@
 				md5=""
 			fi
 		fi
-		if [ "$md5" = "" ]; then
+		if [ -z "$md5" ]; then
 			[ "$dest2" = "$dest" ] || mv "$dest2" "$dest"
 			case "$typ" in
 			    gz)  gunzip "$dest" ;;
@@ -478,7 +478,7 @@
 	done
 	COMPONENTS="$(echo $COMPONENTS)"
 
-	if [ "$COMPONENTS" = "" ]; then
+	if [ -z "$COMPONENTS" ]; then
 		mv "$reldest" "$reldest.malformed"
 		error 1 INVALIDREL "Invalid Release file, no valid components"
 	fi
@@ -637,9 +637,9 @@
 		local pkgdest="$TARGET/$($DLDEST pkg "$SUITE" "$c" "$ARCH" "$m" "$path")"
 		if [ ! -e "$pkgdest" ]; then continue; fi
 		pkgs_to_get="$(download_debs "$m" "$pkgdest" $pkgs_to_get 5>&1 1>&6)"
-		if [ "$pkgs_to_get" = "" ]; then break; fi
+		if [ -z "$pkgs_to_get" ]; then break; fi
 	    done 6>&1
-	    if [ "$pkgs_to_get" = "" ]; then break; fi
+	    if [ -z "$pkgs_to_get" ]; then break; fi
 	done
 	progress $dloaddebs $totaldebs DOWNDEBS "Downloading packages"
 	if [ "$pkgs_to_get" != "" ]; then