fix typo mistake i made by accident

jme3-core/src/main/java/com/jme3/texture/TextureArray.java

@@ -175,7 +175,7 @@ public class TextureArray extends Texture {
 
     @Override
     public boolean equals(Object other) {
-        if (this == obj) {
+        if (this == other) {
             return true; 
         }
         if (!(other instanceof TextureArray)) {