Always initialize RData
Always initialize RData

Even though we normally initialize in Data further, we want to
initialize this anyway so in the case there are bugs they don't show
themselves as impossible to debug, but as a more normal segv because of
a null pointer dereference.

ruipserra/rubinius,Wirachmat/rubinius,dblock/rubinius,kachick/rubinius,ngpestelos/rubinius,jsyeo/rubinius,kachick/rubinius,jemc/rubinius,digitalextremist/rubinius,mlarraz/rubinius,kachick/rubinius,ngpestelos/rubinius,benlovell/rubinius,sferik/rubinius,benlovell/rubinius,sferik/rubinius,pH14/rubinius,heftig/rubinius,ngpestelos/rubinius,kachick/rubinius,dblock/rubinius,jemc/rubinius,benlovell/rubinius,ruipserra/rubinius,digitalextremist/rubinius,benlovell/rubinius,kachick/rubinius,jemc/rubinius,digitalextremist/rubinius,dblock/rubinius,sferik/rubinius,Azizou/rubinius,jsyeo/rubinius,sferik/rubinius,pH14/rubinius,jemc/rubinius,Azizou/rubinius,jsyeo/rubinius,Azizou/rubinius,pH14/rubinius,mlarraz/rubinius,pH14/rubinius,benlovell/rubinius,jsyeo/rubinius,dblock/rubinius,ngpestelos/rubinius,kachick/rubinius,Azizou/rubinius,heftig/rubinius,mlarraz/rubinius,heftig/rubinius,jsyeo/rubinius,mlarraz/rubinius,digitalextremist/rubinius,pH14/rubinius,Wirachmat/rubinius,ruipserra/rubinius,jemc/rubinius,ruipserra/rubinius,heftig/rubinius,Wirachmat/rubinius,pH14/rubinius,sferik/rubinius,ngpestelos/rubinius,benlovell/rubinius,ngpestelos/rubinius,digitalextremist/rubinius,ruipserra/rubinius,benlovell/rubinius,jsyeo/rubinius,dblock/rubinius,jemc/rubinius,dblock/rubinius,kachick/rubinius,ruipserra/rubinius,ruipserra/rubinius,heftig/rubinius,mlarraz/rubinius,Wirachmat/rubinius,Wirachmat/rubinius,sferik/rubinius,heftig/rubinius,Azizou/rubinius,Azizou/rubinius,digitalextremist/rubinius,digitalextremist/rubinius,ngpestelos/rubinius,jsyeo/rubinius,pH14/rubinius,mlarraz/rubinius,Wirachmat/rubinius,kachick/rubinius,jemc/rubinius,Azizou/rubinius,mlarraz/rubinius,heftig/rubinius,dblock/rubinius,sferik/rubinius,Wirachmat/rubinius