Fixed the dictionary_size() member functions in the kcentroid overloads so

that they always return the correct numbers.

--HG--
extra : convert_revision : svn%3Afdd8eb12-d10e-0410-9acb-85c331704f74/trunk%402960

dlib/svm/kcentroid_overloads.h

@@ -537,7 +537,12 @@ namespace dlib
         ) const 
         { 
             if (samples_seen > 0)
-                return 1;
+            {
+                if (std::abs(w_extra) > std::numeric_limits<scalar_type>::epsilon())
+                    return 1;
+                else
+                    return 2;
+            }
             else
                 return 0;
         }
@@ -1155,9 +1160,16 @@ namespace dlib
         ) const 
         { 
             if (samples_seen > 0)
-                return 1;
+            {
+                if (std::abs(w_extra) > std::numeric_limits<scalar_type>::epsilon())
+                    return 1;
+                else
+                    return 2;
+            }
             else
+            {
                 return 0;
+            }
         }
 
         friend void serialize(const kcentroid& item, std::ostream& out)