Use gcc -ansi -pedantic in 9c. Fix many non-C89-isms.

src/cmd/htmlroff/a.h

@@ -30,7 +30,7 @@ enum
 	ArgMode = 1<<3,
 	HtmlMode = 1<<4,
 	
-	MaxLine = 1024,
+	MaxLine = 1024
 };
 
 Rune*	L(char*);

src/cmd/htmlroff/char.c

@@ -70,7 +70,7 @@ static Trtab trinit[] =
 	"em",	0x2014,
 	"en",	0x2013,
 	"mi",	Umi,
-	"fm",	0x2032,
+	"fm",	0x2032
 };
 
 Rune

src/cmd/htmlroff/roff.c

@@ -7,7 +7,7 @@ enum
 	MAXESC = 60,
 	MAXLINE = 1024,
 	MAXIF = 20,
-	MAXARG = 10,
+	MAXARG = 10
 };
 
 typedef struct Esc Esc;

src/cmd/htmlroff/t17.c

@@ -47,7 +47,7 @@ Env defenv =
 	12,
 	0,
 	0,
-	0,
+	0
 };
 
 Env env[3];

src/cmd/htmlroff/t4.c

@@ -49,7 +49,7 @@ r_fi(int argc, Rune **argv)
 	USED(argc);
 	USED(argv);
 	nr(L(".fi"), 1);
-// warn(".fi");
+/* warn(".fi"); */
 }
 
 /* no-fill mode */

src/cmd/htmlroff/t7.c

@@ -375,7 +375,7 @@ r_di(int argc, Rune **argv)
 	if(argc == 1){
 		/* end diversion */
 		if(ndi <= 0){
-			// warn("unmatched %C%S", dot, argv[0]);
+			/* warn("unmatched %C%S", dot, argv[0]); */
 			return;
 		}
 		flushdi();