options: Parse --log-*=* first

Needed if parsing any other command line flags logs any warnings, as
8e10241 does

(cherry picked from commit af18da9)

src/wesnoth.cpp

@@ -338,6 +338,17 @@ static int process_command_args(const commandline_options& cmdline_opts)
 {
 	// Options that don't change behavior based on any others should be checked alphabetically below.
 
+	if(cmdline_opts.log) {
+		for(const auto& log_pair : cmdline_opts.log.get()) {
+			const std::string log_domain = log_pair.second;
+			const int severity = log_pair.first;
+			if(!lg::set_log_domain_severity(log_domain, severity)) {
+				std::cerr << "unknown log domain: " << log_domain << '\n';
+				return 2;
+			}
+		}
+	}
+
 	if(cmdline_opts.userconfig_dir) {
 		filesystem::set_user_config_dir(*cmdline_opts.userconfig_dir);
 	}
@@ -429,17 +440,6 @@ static int process_command_args(const commandline_options& cmdline_opts)
 		return 0;
 	}
 
-	if(cmdline_opts.log) {
-		for(const auto& log_pair : cmdline_opts.log.get()) {
-			const std::string log_domain = log_pair.second;
-			const int severity = log_pair.first;
-			if(!lg::set_log_domain_severity(log_domain, severity)) {
-				std::cerr << "unknown log domain: " << log_domain << '\n';
-				return 2;
-			}
-		}
-	}
-
 	if(cmdline_opts.logdomains) {
 		std::cout << lg::list_logdomains(*cmdline_opts.logdomains);
 		return 0;