[libgphoto2] Fix crash when dealing with PTP devices without a memory card (rhbz#915688)

[Hans de Goede]

commit 9f458992d12573d95e71e3b98282569af82e5e5c
Author: Hans de Goede <hdegoede at redhat.com>
Date:   Sat May 4 11:29:44 2013 +0200

    Fix crash when dealing with PTP devices without a memory card (rhbz#915688)

 libgphoto2-ptp-crash-on-no-card.patch |   17 +++++++++++++++++
 libgphoto2.spec                       |    7 ++++++-
 2 files changed, 23 insertions(+), 1 deletions(-)
---
diff --git a/libgphoto2-ptp-crash-on-no-card.patch b/libgphoto2-ptp-crash-on-no-card.patch
new file mode 100644
index 0000000..f309200
--- /dev/null
+++ b/libgphoto2-ptp-crash-on-no-card.patch
@@ -0,0 +1,17 @@
+http://sourceforge.net/p/gphoto/bugs/945/
+
+diff -up libgphoto2-2.5.1.1/camlibs/ptp2/ptp.c~ libgphoto2-2.5.1.1/camlibs/ptp2/ptp.c
+--- libgphoto2-2.5.1.1/camlibs/ptp2/ptp.c~	2013-01-27 19:17:03.000000000 +0100
++++ libgphoto2-2.5.1.1/camlibs/ptp2/ptp.c	2013-05-04 11:21:32.558255859 +0200
+@@ -1877,6 +1877,11 @@ ptp_canon_eos_getobjectinfoex (
+ 	if (ret != PTP_RC_OK)
+ 		return ret;
+ 
++	if (!data) {
++		*nrofentries = 0;
++		return PTP_RC_OK;
++	}
++
+ 	*nrofentries = dtoh32a(data);
+ 	*entries = malloc(*nrofentries * sizeof(PTPCANONFolderEntry));
+ 	if (!*entries)
diff --git a/libgphoto2.spec b/libgphoto2.spec
index 8eed15f..f097014 100644
--- a/libgphoto2.spec
+++ b/libgphoto2.spec
@@ -2,7 +2,7 @@
 
 Name:           libgphoto2
 Version:        2.5.1.1
-Release:        3%{?dist}
+Release:        4%{?dist}
 Summary:        Library for accessing digital cameras
 Group:          Development/Libraries
 # GPLV2+ for the main lib (due to exif.c) and most plugins, some plugins GPLv2
@@ -14,6 +14,7 @@ Patch2:         gphoto2-storage.patch
 Patch3:         gphoto2-ixany.patch
 Patch4:         gphoto2-device-return.patch
 Patch5:         libgphoto2-ptp-usb3.patch
+Patch6:         libgphoto2-ptp-crash-on-no-card.patch
 BuildRequires:  libusb1-devel, libusb-devel >= 0.1.5
 BuildRequires:  lockdev-devel
 BuildRequires:  libexif-devel
@@ -57,6 +58,7 @@ use libgphoto2.
 %patch3 -p1 -b .ixany
 %patch4 -p1 -b .device-return
 %patch5 -p1
+%patch6 -p1
 
 for i in AUTHORS ChangeLog COPYING libgphoto2_port/AUTHORS libgphoto2_port/COPYING.LIB `find -name 'README.*'`; do
 	mv ${i} ${i}.old
@@ -159,6 +161,9 @@ cat libgphoto2*.lang >> %{name}.lang
 %{_mandir}/man3/*
 
 %changelog
+* Sat May  4 2013 Hans de Goede <hdegoede at redhat.com> - 2.5.1.1-4
+- Fix crash when dealing with PTP devices without a memory card (rhbz#915688)
+
 * Thu May  2 2013 Hans de Goede <hdegoede at redhat.com> - 2.5.1.1-3
 - Fix PTP devices not working in USB-3 ports (rhbz#819918)
 - Cleanup spec-file