[LyX/master] improved mount state check

[Stephan Witt]

commit 0e4de64d5e30260b5526a2999602762e923c9d25
Author: Stephan Witt <sw...@lyx.org>
Date:   Fri Oct 24 18:14:42 2014 +0200

    improved mount state check

diff --git a/development/LyX-Mac-binary-release.sh 
b/development/LyX-Mac-binary-release.sh
index 4fb7547..958d801 100644
--- a/development/LyX-Mac-binary-release.sh
+++ b/development/LyX-Mac-binary-release.sh
@@ -860,7 +860,8 @@ make_dmg() {
 
        hdiutil create -type SPARSE -size ${DMGSIZE:-"250m"} -fs HFS+ -volname 
"${LyxBase}" "${DMGNAME}"
        # Unmount currently mounted disk image
-       test -d /Volumes/"${LyxBase}" && umount /Volumes/"${LyxBase}"
+       mount | grep "${LyxBase}" && umount /Volumes/"${LyxBase}"
+       test -d /Volumes/"${LyxBase}" && rmdir /Volumes/"${LyxBase}"
 
        # Mount the disk image
        hdiutil attach "${DMGNAME}.sparseimage"