tradcpp: upgrade to 0.5.3

cde/util/tradcpp/TODO

@@ -8,7 +8,6 @@ not implemented:
 	- warns.endiflabels. (they cause errors)
 	- warns.unused.	
 	- the -iremap option.
-	- #line directives.
 	- $CPP_RESTRICTED
 	- other environment variables
 
@@ -16,11 +15,12 @@ tidy up:
 	- get rid of inlinedefs.h
 	- use of places in and below macro.c is pretty bogus.
 	- macro code should be reworked.
+	- place_changefile is manky and wastes memory. Also, in an ideal
+	  world we'd remember the place #line changed the name and refer
+	  to it when printing errors.
 
 fix:
 	- "#if 0 && 1/0" should not crash; fix eval method.
-	- an unterminated comment is reported as "no newline at end of file"
-	  (which isn't fatal by default)
 	- quote characters and comment delimiters that are emitted by
 	  macros are not recognized. See:
 		t34 (should produce a quote and FOO Q)
@@ -31,3 +31,7 @@ fix:
 	  twice, once when the macro is defined and again when it's
 	  expanded. Note that gcc's cpp -traditional is getting t37
 	  wrong, and it gets t36 wrong with -C.
+	- remove the intentionally undocumented -p option and generate
+	  proper linenumber output. (also, in this code what happens if
+	  a comment spans files? I bet currently it will emit the line
+	  number into the comment.)