Another size_t fix

git-svn-id: http://www.openflipper.org/svnrepo/OpenFlipper/branches/Free@17118 383ad7c9-94d9-4d36-a494-682f7c89f535

BasePlugin/PluginFunctions.cc

@@ -146,7 +146,7 @@ void setDataRoot( BaseObject* _root ) {
    objectRoot_ = _root;
 }
 
-int viewers( ) {
+size_t viewers( ) {
   return examiner_widgets_.size();
 }
 

BasePlugin/PluginFunctions.hh

@@ -187,7 +187,7 @@ int visibleCount();
 
 /// Get the number of viewers
 DLLEXPORT
-int viewers( );
+size_t viewers( );
 
 /** \brief Disable the core light handling
 *