Fix regression in Share Dialog

I've caused a regression to "Use href param instead of link for share dialog " with Pull Request https://github.com/Wizcorp/phonegap-facebook-plugin/pull/684

This commit fixes the regression while keeping the native Share Dialog
Fix regression in Share Dialog

I've caused a regression to "Use href param instead of link for share dialog " with Pull Request https://github.com/Wizcorp/phonegap-facebook-plugin/pull/684

This commit fixes the regression while keeping the native Share Dialog
Merge pull request #722 from josemedaglia/patch-1

Fix regression in Share Dialog ("Use href param instead of link for share dialog")