BUG: fix ITK bug in dynamic library loader. Bug reported at...

BUG: fix ITK bug in dynamic library loader. Bug reported at https://itk.icts.uiowa.edu/jira/browse/ITK-2694

Utilities/ITK/Code/Common/itkObjectFactoryBase.cxx

@@ -301,7 +301,8 @@ NameIsSharedLibrary(const char* name)
 #endif
   
   std::string sname = name;
-  if ( sname.rfind(extension) == sname.size() - extension.size() )
+  size_t extensionpos = sname.rfind(extension);
+  if ( extensionpos != std::string::npos && extensionpos == sname.size() - extension.size() )
     {
     return true;
     }