Build fix for Qt 5.5 fix.

alethzero/MainWin.cpp

@@ -1768,7 +1768,7 @@ void Main::on_blocks_currentItemChanged()
 				s << "<div>" << sha3(i.data()).abridged() << ": <b>" << receipts.receipts[ii].stateRoot() << "</b> [<b>" << receipts.receipts[ii].gasUsed() << "</b> used]" << "</div>";
 				++ii;
 			}
-			s << "<div>Post: <b>" << info.stateRoot << "</b>" << "</div>";
+			s << "<div>Post: <b>" << info.stateRoot() << "</b>" << "</div>";
 			s << "<div>Dump: " ETH_HTML_SPAN(ETH_HTML_MONO) << toHex(block[0].data()) << "</span>" << "</div>";
 			s << "<div>Receipts-Hex: " ETH_HTML_SPAN(ETH_HTML_MONO) << toHex(receipts.rlp()) << "</span></div>";
 		}