Fixed slow OBJ reader (Thanks to Etienne Danvoye for the patch)

Updated changelog

Doc/changelog.docu

@@ -9,10 +9,17 @@
 
 <tr valign=top><td><b>7.1</b> (?/?/?)</td><td>
 
+b>IO</b>
+<ul>
+<li>Fixed slow OBJ reader (Thanks to Etienne Danvoye for the patch) </li>
+</ul>
 
-<b>General</b>
+
+<b>Build System</b>
 <ul>
 <li>Remove old qmake project files. Unmaintained for a very long time</li>
+<li>Replaced Qt finders</li>
+<li>Added VS 2017 to CI builds</li>
 </ul>
 
 </tr>

src/OpenMesh/Core/IO/reader/OBJReader.cc

@@ -540,6 +540,7 @@ read(std::istream& _in, BaseImporter& _bi, Options& _opt)
 
       vhandles.clear();
       face_texcoords.clear();
+      face_texcoords3d.clear();
 
       // read full line after detecting a face
       std::string faceLine;