Test: Remove the (exit 1) lines.

I suspect that I used these in the original version because
Autoconf's manual describes that such a trick is needed in
some specific situations for portability reasons. None of those
situations listed on Autoconf 2.71 manual apply to these test
scripts though so this cleans them up.

tests/test_compress.sh

@@ -13,7 +13,6 @@
 if test -x ../src/xz/xz ; then
 	:
 else
-	(exit 77)
 	exit 77
 fi
 
@@ -21,7 +20,6 @@ fi
 eval 'unset foo ; foo() { return 42; } ; foo'
 if test $? != 42 ; then
 	echo "/bin/sh doesn't support functions, skipping this test."
-	(exit 77)
 	exit 77
 fi
 
@@ -30,7 +28,6 @@ test_xz() {
 		:
 	else
 		echo "Compressing failed: $* $FILE"
-		(exit 1)
 		exit 1
 	fi
 
@@ -38,7 +35,6 @@ test_xz() {
 		:
 	else
 		echo "Decompressing failed: $* $FILE"
-		(exit 1)
 		exit 1
 	fi
 
@@ -47,7 +43,6 @@ test_xz() {
 	else
 		echo "Decompressed file does not match" \
 				"the original: $* $FILE"
-		(exit 1)
 		exit 1
 	fi
 
@@ -56,7 +51,6 @@ test_xz() {
 			:
 		else
 			echo "Decompressing failed: $* $FILE"
-			(exit 1)
 			exit 1
 		fi
 
@@ -65,7 +59,6 @@ test_xz() {
 		else
 			echo "Decompressed file does not match" \
 					"the original: $* $FILE"
-			(exit 1)
 			exit 1
 		fi
 	fi
@@ -85,13 +78,11 @@ case $FILE in
 		else
 			rm -f "$FILE"
 			echo "Failed to create the file '$FILE'."
-			(exit 1)
 			exit 1
 		fi
 		;;
 	'')
 		echo "No test file was specified."
-		(exit 1)
 		exit 1
 		;;
 esac
@@ -129,5 +120,4 @@ do
 	test_xz $ARGS --lzma2=dict=64KiB,nice=32,mode=fast
 done
 
-(exit 0)
 exit 0

tests/test_files.sh

@@ -15,7 +15,6 @@ XZDEC=../src/xzdec/xzdec
 test -x "$XZ" || XZ=
 test -x "$XZDEC" || XZDEC=
 if test -z "$XZ$XZDEC"; then
-	(exit 77)
 	exit 77
 fi
 
@@ -25,7 +24,6 @@ do
 		:
 	else
 		echo "Good file failed: $I"
-		(exit 1)
 		exit 1
 	fi
 
@@ -33,7 +31,6 @@ do
 		:
 	else
 		echo "Good file failed: $I"
-		(exit 1)
 		exit 1
 	fi
 done
@@ -42,13 +39,11 @@ for I in "$srcdir"/files/bad-*.xz
 do
 	if test -n "$XZ" && "$XZ" -dc "$I" > /dev/null 2>&1; then
 		echo "Bad file succeeded: $I"
-		(exit 1)
 		exit 1
 	fi
 
 	if test -n "$XZDEC" && "$XZDEC" "$I" > /dev/null 2>&1; then
 		echo "Bad file succeeded: $I"
-		(exit 1)
 		exit 1
 	fi
 done
@@ -57,7 +52,6 @@ done
 I="$srcdir/files/bad-3-index-uncomp-overflow.xz"
 if test -n "$XZ" && "$XZ" -l "$I" > /dev/null 2>&1; then
 	echo "Bad file succeeded with xz -l: $I"
-	(exit 1)
 	exit 1
 fi
 
@@ -67,7 +61,6 @@ do
 		:
 	else
 		echo "Good file failed: $I"
-		(exit 1)
 		exit 1
 	fi
 done
@@ -76,10 +69,8 @@ for I in "$srcdir"/files/bad-*.lzma
 do
 	if test -n "$XZ" && "$XZ" -dc "$I" > /dev/null 2>&1; then
 		echo "Bad file succeeded: $I"
-		(exit 1)
 		exit 1
 	fi
 done
 
-(exit 0)
 exit 0

tests/test_scripts.sh

@@ -16,7 +16,6 @@ XZGREP=../src/scripts/xzgrep
 
 for i in XZ XZDIFF XZGREP; do
 	eval test -x "\$$i" && continue
-	(exit 77)
 	exit 77
 done
 
@@ -32,7 +31,6 @@ otherpostimage=$srcdir/files/good-1-lzma2-1.xz
 status=$?
 if test "$status" != 0 ; then
 	echo "xzdiff with no changes exited with status $status != 0"
-	(exit 1)
 	exit 1
 fi
 
@@ -40,7 +38,6 @@ fi
 status=$?
 if test "$status" != 1 ; then
 	echo "xzdiff with changes exited with status $status != 1"
-	(exit 1)
 	exit 1
 fi
 
@@ -48,7 +45,6 @@ fi
 status=$?
 if test "$status" != 2 ; then
 	echo "xzdiff with missing operand exited with status $status != 2"
-	(exit 1)
 	exit 1
 fi
 
@@ -68,9 +64,7 @@ if cmp -s "$srcdir/xzgrep_expected_output" xzgrep_test_output ; then
 	:
 else
 	echo "unexpected output from xzgrep"
-	(exit 1)
 	exit 1
 fi
 
-(exit 0)
 exit 0