It's not a big deal. Mine has some of those on the roof as well. As long as it is not split or has a hole in it I wouldn't worry about it.
__________________ Chuck - Sparta, TN
2012 Jay Flight 22FB, 2 x Honda EU2000i
2013 GMC Yukon XL Denali AWD
EDUCATION is what you get when you read the fine print.....
EXPERIENCE is what you get when you don't.