[rnc2rng.awk] Fixing more awk --lint warnings
[rnc2rng.awk] Fixing more awk --lint warnings

Distrotech/gnome-doc-utils,Distrotech/yelp-xsl,jnavila/gnome-doc-utils,Distrotech/gnome-doc-utils,jnavila/gnome-doc-utils,Distrotech/yelp-xsl