Added a default constructor to the kcentroid object since it can be irritating in

some cases without one.

--HG--
extra : convert_revision : svn%3Afdd8eb12-d10e-0410-9acb-85c331704f74/trunk%403013

dlib/svm/kcentroid.h

@@ -66,6 +66,16 @@ namespace dlib
         typedef typename kernel_type::sample_type sample_type;
         typedef typename kernel_type::mem_manager_type mem_manager_type;
 
+        kcentroid (
+        ) : 
+            my_remove_oldest_first(false),
+            my_tolerance(0.001),
+            my_max_dictionary_size(1000000),
+            bias(0),
+            bias_is_stale(false)
+        {
+            clear_dictionary();
+        }
 
         explicit kcentroid (
             const kernel_type& kernel_, 

dlib/svm/kcentroid_abstract.h

@@ -53,6 +53,16 @@ namespace dlib
         typedef typename kernel_type::sample_type sample_type;
         typedef typename kernel_type::mem_manager_type mem_manager_type;
 
+        kcentroid (
+        );
+        /*!
+            ensures
+                - this object is properly initialized
+                - #tolerance() == 0.001 
+                - #get_kernel() == kernel_type() (i.e. whatever the kernel's default value is) 
+                - #max_dictionary_size() == 1000000
+                - #remove_oldest_first() == false 
+        !*/
 
         explicit kcentroid (
             const kernel_type& kernel_,