eeschema segfault when a library "T" command is missing Halign Valign values

Fixes: lp:1668082
https://bugs.launchpad.net/kicad/+bug/1668082

eeschema/sch_legacy_plugin.cpp

@@ -2905,6 +2905,9 @@ LIB_TEXT* SCH_LEGACY_PLUGIN_CACHE::loadText( std::unique_ptr< LIB_PART >& aPart,
         if( parseInt( aReader, line, &line ) > 0 )
             text->SetBold( true );
 
+        // Some old libaries version > 2.0 do not have these options for text justification:
+        if( !is_eol( *line ) )
+        {
             switch( parseChar( aReader, line, &line ) )
             {
             case 'L':
@@ -2943,6 +2946,7 @@ LIB_TEXT* SCH_LEGACY_PLUGIN_CACHE::loadText( std::unique_ptr< LIB_PART >& aPart,
                                  aReader, line );
             }
         }
+    }
 
     return text.release();
 }