Fix phone_screenshot

git-svn-id: https://svn.code.sf.net/p/chan-sccp-b/code/trunk@4836 43c1dc8c-776e-4df2-8ef1-6e829299be21
Fix scr2img

git-svn-id: https://svn.code.sf.net/p/chan-sccp-b/code/trunk@4837 43c1dc8c-776e-4df2-8ef1-6e829299be21