dumpvariabletransformation: squash 'used unitialised' warnings
dumpvariabletransformation: squash 'used unitialised' warnings

Just initialise all vars, as some compilers seem to be more stupid than
others.

zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb