Merge pull request #175 from csmith/gradle-pmd

Fix some PMD errors.

src/com/dmdirc/commandparser/commands/global/SetCommand.java

             res.add("--server");
             res.add("--channel");
             res.excludeAll();
-        } else if (arg == 1 && previousArgs.size() >= 1) {
+        } else if (arg == 1 && !previousArgs.isEmpty()) {
             if ("--unset".equalsIgnoreCase(previousArgs.get(0))
                     || "--append".equalsIgnoreCase(previousArgs.get(0))
                     || "--server".equalsIgnoreCase(previousArgs.get(0))

src/com/dmdirc/ui/core/feedback/FeedbackSender.java

         try {
             final List<String> response = downloader.getPage(
                     "https://feedback.dmdirc.com/dialog/", postData);
-            if (response.size() >= 1) {
-                return response.get(0);
-            } else {
+            if (response.isEmpty()) {
                 return "Feedback failure: Unknown response from the server.";
+            } else {
+                return response.get(0);
             }
         } catch (IOException ex) {
             return "Feedback failure: " + ex.getMessage();