Convert buffer name to unicode

Fix JumpToLocation tests on Python 2.

python/ycm/vimsupport.py

@@ -152,7 +152,7 @@ def BufferIsVisible( buffer_number ):
 
 def GetBufferFilepath( buffer_object ):
   if buffer_object.name:
-    return buffer_object.name
+    return ToUnicode( buffer_object.name )
   # Buffers that have just been created by a command like :enew don't have any
   # buffer name so we use the buffer number for that.
   return os.path.join( GetCurrentDirectory(), str( buffer_object.number ) )
@@ -372,7 +372,7 @@ def TryJumpLocationInOpenedTab( filename, line, column ):
 
   for tab in vim.tabpages:
     for win in tab.windows:
-      if win.buffer.name == filepath:
+      if GetBufferFilepath( win.buffer ) == filepath:
         vim.current.tabpage = tab
         vim.current.window = win
         vim.current.window.cursor = ( line, column - 1 )