Fixed Font::operator= not handling the reference counter properly (which was leading to crashes after copies of sf::Font instances)

git-svn-id: https://sfml.svn.sourceforge.net/svnroot/sfml/branches/sfml2@1414 4e206d99-4929-0410-ac5d-dfc041789085

src/SFML/Graphics/Font.cpp

@@ -239,6 +239,7 @@ Font& Font::operator =(const Font& right)
     std::swap(myPages,       temp.myPages);
     std::swap(myPixelBuffer, temp.myPixelBuffer);
     std::swap(myCurrentSize, temp.myCurrentSize);
+    std::swap(myRefCount,    temp.myRefCount);
 
     return *this;
 }