minor assert changes.

[[Imported from SVN: r2020]]

grid/alu3dgrid/myautoptr.hh

@@ -68,14 +68,16 @@ public:
   //! return object reference
   Pointer & operator * () const
   {
-    assert((ptr_ != 0) && (owner_) );
+    assert(ptr_ != 0);
+    assert(owner_);
     return *ptr_;
   }
 
   //! return object pointer
   Pointer * operator -> () const
   {
-    assert((ptr_ != 0) && (owner_) );
+    assert(ptr_ != 0);
+    assert(owner_);
     return ptr_;
   }