qt: fix unicode character display on osx when building with 10.7 sdk
qt: fix unicode character display on osx when building with 10.7 sdk

(cherry picked from commit 292cc072f3bada256bc6af9970512eb9dec8d93a)

# Conflicts:
#	src/qt/bitcoin.cpp

reddcoin-project/reddcoin,reddcoin-project/reddcoin,reddcoin-project/reddcoin,reddcoin-project/reddcoin,reddcoin-project/reddcoin,reddcoin-project/reddcoin