Kludge peek() and poke() to not sign extend on machines with signed c…

…hars,

so a 0xff character will not sign extend and become an EOF.  This breaks
a test in mun\CC\83oz.t (which tripped the 0xff becomes EOF bug) so that
test needed to be rewritten.

Inline comment handling is still broken!  It only checks for a > to end
a html comment, not the correct --> sequence!

generate.c

@@ -50,22 +50,22 @@ pushc(char c, MMIOT *f)
 
 /* look <i> characters ahead of the cursor.
  */
-static inline int
+static inline unsigned int
 peek(MMIOT *f, int i)
 {
 
     i += (f->isp-1);
 
-    return (i >= 0) && (i < S(f->in)) ? T(f->in)[i] : EOF;
+    return (i >= 0) && (i < S(f->in)) ? (unsigned char)T(f->in)[i] : EOF;
 }
 
 
 /* pull a byte from the input buffer
  */
-static inline int
+static inline unsigned int
 pull(MMIOT *f)
 {
-    return ( f->isp < S(f->in) ) ? T(f->in)[f->isp++] : EOF;
+    return ( f->isp < S(f->in) ) ? (unsigned char)T(f->in)[f->isp++] : EOF;
 }