ghostscript-native:fix disable-system-libtiff

Modify configure to add the check to make sure
ghostscrip could work while system-libtiff is
disabled.

Signed-off-by: Hongxu Jia <hongxu.jia@windriver.com>
Upstream-Status: Pending
---
diff --git a/base/configure.ac b/base/configure.ac
index bb05105..4b817ac 100644
--- a/base/configure.ac
+++ b/base/configure.ac
@@ -814,17 +814,23 @@ Disabling tiff output devices.])
 esac
 
 if test $SHARE_LIBTIFF -eq 0; then
-      echo
-      echo "Running libtiff configure script..."
-      olddir=`pwd`
-      cd $LIBTIFFDIR && ./configure --disable-jbig $SUBCONFIG_OPTS
-      status=$?
-      if test "$status" -ne 0 ; then
-        AC_MSG_ERROR([libtiff configure script failed], $status)
-      fi
-      cd $olddir
-      echo
-      echo "Continuing with Ghostscript configuration..."
+    if test -e $LIBTIFFDIR/configure; then
+        echo
+        echo "Running libtiff configure script..."
+        olddir=`pwd`
+        cd $LIBTIFFDIR && ./configure --disable-jbig $SUBCONFIG_OPTS
+        status=$?
+        if test "$status" -ne 0 ; then
+          AC_MSG_ERROR([libtiff configure script failed], $status)
+        fi
+        cd $olddir
+        echo
+        echo "Continuing with Ghostscript configuration..."
+    else
+        AC_MSG_NOTICE([Could not find local copy of libtiff.
+Disabling tiff output devices.])
+    fi
+
 fi
 
 AC_SUBST(SHARE_LIBTIFF)
-- 
1.7.10.4