Silence lots of warnings in lib/DtHelp.

* 64bit warnings
* Missing prototypes
* explicit parentheses / brackets

There's still some work to be done, but, as always, it's a start ...

cde/lib/DtHelp/PrintI.h

@@ -130,6 +130,13 @@ void _DtHelpPrintJob(
     Boolean	printToc,
     char *	topicTitle);
 
+extern void _DtHelpInitPrintStuff (
+    _DtHelpPrintStuff * print);
+
+extern void _DtHelpFreePrintStuff (
+    _DtHelpPrintStuff * print,
+    int                 cleanUpKind);
+
 
 #endif /* _PrintI_h */
 /* Do not add anything after this endif. */