Apparently the installer task didn't bother calling init

Change-Id: I32af8305dcc1d513257c55cbc98297073fd45920
Reviewed-on: http://gerrit.dmdirc.com/2394
Reviewed-by: Greg Holmes <greg@dmdirc.com>
Automatic-Compile: DMDirc Build Manager

build-installer.xml

 <project name="DMDirc-installer" default="default" basedir=".">
     <description>Tasks to build the DMDirc installer.</description>
 
-    <target name="-init-installer">
+    <target name="-init-installer" depends="init">
         <taskdef name="nsis" classname="com.danielreese.nsisant.Task">
             <classpath>
                 <fileset dir="lib" includes="*nsis*.jar"/>