Finished deletion. Assorted bug fixes.

- columns can now be deleted/undeleted
- reset active row if deleting that row
- grammar now accepts an empty file
- when a non-canvas entry becomes editable, we set the focus to it
- when adding the first reference to a frame, make it active
- when deleting the active reference to a frame, set the pointer to NULL
- measurements didn't have a drag_new action, causing trying to create them to
  crash fped
- offset field of measurements was incorrectly labeled "width"
- fixed operator precedence in gridify. Someone needs more sleep :-(



git-svn-id: http://svn.openmoko.org/trunk/eda/fped@5398 99fdad57-331a-0410-800a-d7fa5415bdb3

fped.c

@@ -13,6 +13,7 @@
 
 
 #include "cpp.h"
+#include "util.h"
 #include "error.h"
 #include "obj.h"
 #include "inst.h"
@@ -46,6 +47,10 @@ int main(int argc, char **argv)
 		argc--;
 		argv++;
 	}
+
+	if (!part_name)
+		part_name = stralloc("_");
+
 	reporter = report_to_stderr;
 	if (!instantiate())
 		return 1;