Improve parser performance. Don't attempt to create attrs if StartElement didn't see any.
Improve parser performance. Don't attempt to create attrs if StartElement
didn't see any.

Alwnikrotikz/libkml,rashadkm/libkml,dreamstreat/libkml,earthoutreach/libkml,rashadkm/libkml,pombreda/libkml,cboothe/libkml,cboothe/libkml,PiRSquared17/libkml,azzeddine1265/libkml,rashadkm/libkml,azzeddine1265/libkml,PiRSquared17/libkml,sebastic/libkml,giantchen2012/libkml,flychen50/trunk,pombreda/libkml,PiRSquared17/libkml,dreamstreat/libkml,dreamstreat/libkml,libkml/libkml,cboothe/libkml,flychen50/trunk,aaronblanchard/libkml,msmitherdc/libkml,dreamstreat/libkml,earthoutreach/libkml,flychen50/trunk,sebastic/libkml,earthoutreach/libkml,giantchen2012/libkml,sebastic/libkml,aaronblanchard/libkml,pombreda/libkml,flychen50/trunk,sebastic/libkml,giantchen2012/libkml,dreamstreat/libkml,azzeddine1265/libkml,pombreda/libkml,sebastic/libkml,giantchen2012/libkml,flychen50/trunk,cboothe/libkml,pombreda/libkml,giantchen2012/libkml,PiRSquared17/libkml,rashadkm/libkml,pombreda/libkml,cboothe/libkml,giantchen2012/libkml,libkml/libkml,dreamstreat/libkml,sebastic/libkml,PiRSquared17/libkml,pombreda/libkml,aaronblanchard/libkml,msmitherdc/libkml,aaronblanchard/libkml,dreamstreat/libkml,msmitherdc/libkml,Alwnikrotikz/libkml,flychen50/trunk,libkml/libkml,PiRSquared17/libkml,Alwnikrotikz/libkml,dreamstreat/libkml,Alwnikrotikz/libkml,libkml/libkml,aaronblanchard/libkml,aaronblanchard/libkml,flychen50/trunk,libkml/libkml,pombreda/libkml,msmitherdc/libkml,PiRSquared17/libkml,aaronblanchard/libkml,sebastic/libkml,giantchen2012/libkml,earthoutreach/libkml,msmitherdc/libkml,azzeddine1265/libkml,rashadkm/libkml,cboothe/libkml,flychen50/trunk,msmitherdc/libkml,msmitherdc/libkml,azzeddine1265/libkml,azzeddine1265/libkml,cboothe/libkml,giantchen2012/libkml,aaronblanchard/libkml,earthoutreach/libkml,sebastic/libkml,Alwnikrotikz/libkml,PiRSquared17/libkml,azzeddine1265/libkml,msmitherdc/libkml,azzeddine1265/libkml,cboothe/libkml