Fixes to record the function entry point

tools/db/pdb.createprogram.tbl

@@ -15,7 +15,7 @@ CREATE TABLE #PROGNAME#_address
 CREATE TABLE #PROGNAME#_function
 (
   function_id        	SERIAL PRIMARY KEY,
-  file_id            	integer REFERENCES file_info,
+  entry_point_id        integer, 			-- id of the address that is the entry point of this function. 
   name               	text,
   stack_frame_size   	integer,
   out_args_region_size	integer,
@@ -29,8 +29,8 @@ CREATE TABLE #PROGNAME#_instruction
   address_id                integer REFERENCES #PROGNAME#_address,
   parent_function_id        integer,
   orig_address_id           integer,
-  fallthrough_address_id    integer,
-  target_address_id         integer,
+  fallthrough_address_id    integer DEFAULT -1,
+  target_address_id         integer DEFAULT -1,
   data                      bytea,
   callback                  text,
   comment                   text,