New option to fix a potential bug

Dear,

I'm a brazilian developer of the newspaper Folha de São Paulo
(folha.com) and in a new project I came across a potential bug.

I'm using two instances of iScroll in my page, the first work as a
Carossel (using the snap option to slide the divs) and the second to
add a zoom on each page. On the first page, the zoom works perfectly,
but the rest tends to left. I found the "problem", is the
wrapperOffsetLeft. I defined a new option to disable this and now the
zoom in all the pages works without any problem.

Lines 78, 917 and 918.

Sorry the my precarious english.

https://groups.google.com/group/iscroll/browse_thread/thread/4fd6b6ecefd1e16d/755c01fe7c5a7f06?lnk=gst