Fix assert in debug build.

execute block returns (out integer)
as
    declare i integer;
begin
    out = 0;
    outer_while: while (out <= 8) do
    begin
        out = out + 1;

        i = 0;
        while (i <= 5) do
        begin
            i = i + 1;
            if (i = 3) then
                continue outer_while;
            suspend;
        end
    end
end!

Author: asfernandes

src/dsql/StmtNodes.cpp

@@ -6012,8 +6012,6 @@ const StmtNode* LabelNode::execute(thread_db* /*tdbb*/, Request* request, ExeSta
 			return statement;
 
 		case Request::req_unwind:
-			fb_assert(!(request->req_flags & req_continue_loop));
-
 			if (request->req_label == labelNumber &&
 				(request->req_flags & (req_leave | req_error_handler)))
 			{