Only FixupJunctions for Legacy designs

The new s-expression format embeds the library within the file
so there should be no connectivity issues (unless they were present
in the original design).

This fixes a potential issue with EAGLE imported schematics.

eeschema/files-io.cpp

@@ -583,6 +583,7 @@ bool SCH_EDIT_FRAME::OpenProjectFiles( const std::vector<wxString>& aFileSet, in
     // colinear segments. If a schematic is saved without a valid
     // cache library or missing installed libraries, this can cause connectivity errors
     // unless junctions are added.
+    if( schFileType == SCH_IO_MGR::SCH_LEGACY )
         FixupJunctions();
 
     SyncView();