hadley/dplyr — pull request #661 by eibanez (2014-10-06 19:01:00+00:00)
Title: Avoid compiler warning

Compiling on Windows I get the following warning, now fixed.
```
between.cpp: In function 'Rcpp::LogicalVector between(Rcpp::NumericVector, double, double)':
between.cpp:24:39: warning: suggest parentheses around comparison in operand of '&' [-Wparentheses]
```