File pion-net-gcc47-symbols-lookup.patch of Package pion-net

Fix error on symbol lookup for GCC 4.7

Author: Jan Vcelak <jvcelak@redhat.com>

diff a/common/include/pion/PluginManager.hpp b/common/include/pion/PluginManager.hpp
--- a/common/include/pion/PluginManager.hpp
+++ b/common/include/pion/PluginManager.hpp
@@ -420,7 +420,7 @@ inline void PluginManager<PLUGIN_TYPE>::
 				delete i->second.first;
 			}
 		}
-		erase(std::map<std::string, std::pair<PLUGIN_TYPE *, PionPluginPtr<PLUGIN_TYPE> > >::begin(),
+		this->erase(std::map<std::string, std::pair<PLUGIN_TYPE *, PionPluginPtr<PLUGIN_TYPE> > >::begin(),
 			  std::map<std::string, std::pair<PLUGIN_TYPE *, PionPluginPtr<PLUGIN_TYPE> > >::end());
 	}
 }