Fixes NPE if resource icon is not found.

src/net/java/sip/communicator/service/protocol/icqconstants/IcqStatusEnum.java

@@ -135,6 +135,9 @@ public static byte[] loadIcon(String imagePath) {
         InputStream is = IcqStatusEnum.class.getClassLoader()
             .getResourceAsStream(imagePath);
 
+        if(is == null)
+            return null;
+
         byte[] icon = null;
         try {
             icon = new byte[is.available()];

src/net/java/sip/communicator/service/protocol/jabberconstants/JabberStatusEnum.java

@@ -270,6 +270,9 @@ public static byte[] loadIcon(String imagePath, Class<?> clazz)
     {
         InputStream is = getResourceAsStream(imagePath, clazz);
 
+        if(is == null)
+            return null;
+
         byte[] icon = null;
         try
         {
@@ -283,7 +286,8 @@ public static byte[] loadIcon(String imagePath, Class<?> clazz)
         finally {
             try
             {
-                is.close();
+                if(is != null)
+                    is.close();
             }
             catch (IOException ex)
             {

src/net/java/sip/communicator/service/protocol/msnconstants/MsnStatusEnum.java

@@ -141,6 +141,9 @@ public static byte[] loadIcon(String imagePath) {
         InputStream is = MsnStatusEnum.class.getClassLoader()
             .getResourceAsStream(imagePath);
 
+        if(is == null)
+            return null;
+
         byte[] icon = null;
         try {
             icon = new byte[is.available()];

src/net/java/sip/communicator/service/protocol/yahooconstants/YahooStatusEnum.java

@@ -174,6 +174,9 @@ public static byte[] loadIcon(String imagePath) {
         InputStream is = YahooStatusEnum.class.getClassLoader()
             .getResourceAsStream(imagePath);
 
+        if(is == null)
+            return null;
+
         byte[] icon = null;
         try {
             icon = new byte[is.available()];