scripted-diff: Replace error() with LogError()

This fixes the log output when -logsourcelocations is used.

Also, instead of 'ERROR:', the log will now say '[error]', like other
errors logged with LogError.

-BEGIN VERIFY SCRIPT-
 sed -i --regexp-extended 's!  error\("([^"]+)"!  LogError("\1\\n"!g' $( git grep -l '  error(' ./src/ )
-END VERIFY SCRIPT-

src/net.cpp

@@ -575,7 +575,7 @@ void CNode::SetAddrLocal(const CService& addrLocalIn) {
     AssertLockNotHeld(m_addr_local_mutex);
     LOCK(m_addr_local_mutex);
     if (addrLocal.IsValid()) {
-        error("Addr local already set for node: %i. Refusing to change from %s to %s", id, addrLocal.ToStringAddrPort(), addrLocalIn.ToStringAddrPort());
+        LogError("Addr local already set for node: %i. Refusing to change from %s to %s\n", id, addrLocal.ToStringAddrPort(), addrLocalIn.ToStringAddrPort());
     } else {
         addrLocal = addrLocalIn;
     }