Only 4 members in people block if width increased

If member block is put in top column it will show only 4 members in people block if width increased. I think it should be adjustable because there is space for 1 more. This issue is in both index and all member page, if some 1 want to show only members on the page. 

Can this issue's fix be included in 7.2.1 or i have to wait for 7.2.2?

It's pretty hard to call this a bug.  All you need to do is adjust the css to suit your personal requirements, but that adjustment isn't necessarily something we All want.  All those divs are float:left, so obviously at their current width, there is NOT enough room for 5 to fit.  Decrease the width to suit your needs.  Don't wait for 7.2.2 because something that isn't broken, isn't going to be fixed.

 This screen shot is of 1200px. My mistake  i checked it again by increasing up to 1265px it start showing the 5th member in the row "IT IS NOT A BUG" sorry for that . Now question is do i have to change BxIndexPageView.php to reduce the gap between the members?

 No. You decrease the width of the block via a css change.  By the looks of it, there's plenty of room to work with.