Fix #32 and #24

Author: Runemoro

src/main/java/org/dimdev/riftloader/Main.java

@@ -138,7 +138,7 @@ public static void runClientInstaller() {
             // Copy rift jar to libraries
             try {
                 String source = Main.class.getProtectionDomain().getCodeSource().getLocation().getPath();
-                if (source.startsWith("/")) {
+                if (source.startsWith("/") && osName.contains("win")) {
                     source = source.substring(1);
                 }
                 File riftJar = new File(minecraftFolder, "libraries/org/dimdev/rift/@VERSION@/rift-@[email protected]");

src/main/java/org/dimdev/riftloader/RiftLoader.java

@@ -243,6 +243,13 @@ public <T> void loadListeners(Class<T> listenerInterface) {
 
         for (Class<?> listenerClass : listenerClasses) {
             if (listenerInterface.isAssignableFrom(listenerClass)) {
+                // Initialize the class first, in case it wants to add itself to the listenerInstanceMap
+                try {
+                    Class.forName(listenerClass.getName(), true, listenerClass.getClassLoader());
+                } catch (ClassNotFoundException e) {
+                    throw new IllegalStateException(e);
+                }
+
                 // Get the instance of that class, or create a new one if it wasn't instantiated yet
                 T listenerInstance = listenerInterface.cast(listenerInstanceMap.get(listenerClass));
                 if (listenerInstance == null) {