Fixed #1049: now it counts the Multiple Options

Due to the internal representation of the answers of Multiple Option questions ("Y") I had to add two conditions as you can see in the code, there is a comment too.

git-svn-id: file:///Users/Shitiz/Downloads/lssvn/source/limesurvey@3069 b72ed6b6-b9f8-46b5-92b4-906544132732