libarchive: Fix read_data_block C name
libarchive: Fix read_data_block C name

Fixes bug 704612.

GNOME/vala,spidermonkdust/vala,frida/vala,GNOME/vala,GNOME/vala,flobrosch/vala-fixes,xdave/pvala,rvu95/vala,rvu95/vala,frida/vala,spidermonkdust/vala,frida/vala,spidermonkdust/vala,frida/vala,Distrotech/vala,flobrosch/vala-fixes,Distrotech/vala,GNOME/vala,flobrosch/vala-fixes,frida/vala,Distrotech/vala,rvu95/vala