fix #20 : the sorting function was not following the strict weak orde…

…ring relationship, in particular comp(a,a)=false

This was leading to a crash probably due to some duplicated items by the sorting algo (thanks @jceipek for pointing this)

server/viewer/vwFileDialog.cpp

@@ -115,7 +115,7 @@ vwFileDialog::draw(int fontSize)
 
         // Sort folders
         std::sort(_dirEntries.begin(), _dirEntries.end(),
-                  [](const Entry& a, const Entry& b)->bool { return strcasecmp(a.name.toChar(), b.name.toChar())<=0; } );
+                  [](const Entry& a, const Entry& b)->bool { return strcasecmp(a.name.toChar(), b.name.toChar())<0; } );
         forceFileSorting = true;
         _isEntriesDirty = false;
     }