adapt GetStakeWeight() to new protocol
adapt GetStakeWeight() to new protocol

Conflicts:

	src/wallet.cpp
	src/wallet.h

thunderrabbit/clams,robvanmieghem/clams,dooglus/clams,thunderrabbit/clams,thunderrabbit/clams,thunderrabbit/clams,dooglus/clams,Jheguy2/Mercury,nochowderforyou/clams,dooglus/clams,nochowderforyou/clams,robvanmieghem/clams,nochowderforyou/clams,Kefkius/clams,robvanmieghem/clams,Kefkius/clams,thunderrabbit/clams,Jheguy2/Mercury,nochowderforyou/clams,Kefkius/clams,dooglus/clams,dooglus/clams,Jheguy2/Mercury,Kefkius/clams,robvanmieghem/clams,Jheguy2/Mercury,Kefkius/clams,robvanmieghem/clams,nochowderforyou/clams,Jheguy2/Mercury