Remove pointless branch on ConfigSource

Change-Id: I6acbc43afc61bd68ebe9bf790585a6f1ce99ae4c
Reviewed-on: http://gerrit.dmdirc.com/652
Automatic-Compile: Gregory Holmes <greg@dmdirc.com>
Reviewed-by: Gregory Holmes <greg@dmdirc.com>

src/com/dmdirc/config/ConfigSource.java

                 .startsWith("false:")) {
             return fallbacks.length >= 2 ? getOptionInt(fallbacks[0], fallbacks[1],
                     Arrays.copyOfRange(fallbacks, 2, fallbacks.length)) : null;
-        }
-        if (value.startsWith("true:")) {
+        } else if (value.startsWith("true:")) {
             return Integer.parseInt(getOption(domain, option).trim().substring(
                     5));
-        } else if (value.startsWith("false:")) {
-            return null;
         } else {
             return Integer.parseInt(getOption(domain, option).trim());
         }