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trfn: support 72000 resolution

--- a/otf.c

+++ b/otf.c

@@ -49,8 +49,8 @@

 static int uwid(int w)

 {

-	int d = 7200 / res;

-	return (w < 0 ? owid(w) - d / 2 : owid(w) + d / 2) / d;

+	int d = 72000 / res;

+	return (w < 0 ? owid(w) - d / 20 : owid(w) + d / 20) * 10 / d;

 }

 /* weather the script is right-to-left */

--- a/trfn.c

+++ b/trfn.c

@@ -8,7 +8,7 @@

 #include "trfn_agl.h"

 #include "trfn_ch.h"

-#define WX(w)		(((w) < 0 ? (w) - trfn_div / 2 : (w) + trfn_div / 2) / trfn_div)

+#define WX(w)		(((w) < 0 ? (w) - trfn_div / 20 : (w) + trfn_div / 20) * (long) 10 / trfn_div)

 #define LEN(a)		((sizeof(a) / sizeof((a)[0])))

 #define HEXDIGS		"0123456789ABCDEF"

 #define NCHAR		8	/* number of characters per glyph */

@@ -17,7 +17,7 @@

 static struct sbuf *sbuf_char;	/* characters */

 static struct sbuf *sbuf_kern;	/* kerning pairs */

-static int trfn_div;		/* divisor of widths */

+static int trfn_div;		/* divisor of widths x 10 */

 static int trfn_swid;		/* space width */

 static int trfn_special;	/* special flag */

 static int trfn_kmin;		/* minimum kerning value */

@@ -343,7 +343,7 @@

 void trfn_init(int res, int spc, int kmin, int bbox, int ligs, int pos)

 {

 	int i;

-	trfn_div = 7200 / res;

+	trfn_div = 72000 / res;

 	trfn_special = spc;

 	trfn_kmin = kmin;

 	trfn_bbox = bbox;