xbps-query: repo_revdeps_cb: simplify by using a dictionary iterator.
xbps-query: repo_revdeps_cb: simplify by using a dictionary iterator.

stpx/xbps,datenwolf/xbps,ebfe/xbps,stpx/xbps,datenwolf/xbps,ebfe/xbps,ebfe/xbps,datenwolf/xbps,stpx/xbps