[glabels] Autosize zint barcode when w == 0 && h == 0.

[Jim Evins <jimevins src gnome org>]

commit ee2801d56d29e847b90849f95a14e2cab518718d
Author: Jim Evins <evins snaught com>
Date:   Mon May 17 20:34:26 2010 -0400

    Autosize zint barcode when w == 0 && h == 0.

 src/bc-zint.c |   15 +++++++++++----
 1 files changed, 11 insertions(+), 4 deletions(-)
---
diff --git a/src/bc-zint.c b/src/bc-zint.c
index e938c71..5c8502c 100644
--- a/src/bc-zint.c
+++ b/src/bc-zint.c
@@ -35,8 +35,8 @@
 /*========================================================*/
 /* Private macros and constants.                          */
 /*========================================================*/
-#define SHRINK_AMOUNT 0.15	/* shrink bars to account for ink spreading */
-#define FONT_SCALE    0.95	/* Shrink fonts just a hair */
+#define DEFAULT_W 144
+#define DEFAULT_H  72
 
 
 /*===========================================*/
@@ -51,7 +51,7 @@ gint module_is_set(struct zint_symbol *symbol, gint y_coord, gint x_coord);
 /* Generate intermediate representation of barcode.                          */
 /*****************************************************************************/
 glBarcode *
-gl_barcode_zint_new (const gchar    *id,
+gl_barcode_zint_new (const gchar          *id,
 			   gboolean        text_flag,
 			   gboolean        checksum_flag,
 			   gdouble         w,
@@ -65,6 +65,13 @@ gl_barcode_zint_new (const gchar    *id,
 
 	symbol = ZBarcode_Create();
 
+        /* Auto set to default size */
+        if ( (w == 0) && (h == 0) )
+        {
+                w = DEFAULT_W;
+                h = DEFAULT_H;
+        }
+
 	/* Assign type flag.  Pre-filter by length for subtypes. */
 	if (g_ascii_strcasecmp (id, "GS1-128") == 0) {
 		symbol->symbology = BARCODE_EAN128;
@@ -259,7 +266,7 @@ static glBarcode *render_zint(struct zint_symbol *symbol, gboolean text_flag) {
 		xoffset -= (strlen(symbol->text) / 2) * 5.0;
 
 		for (p = symbol->text; *p != 0; p++) {
-			if (p != symbol->text && *p == '(') xoffset += 3.0;
+			if (p != (gchar *)symbol->text && *p == '(') xoffset += 3.0;
 			bchar = g_new0 (glBarcodeChar, 1);
 			bchar->x = (textpos + xoffset) * scaler;
 			bchar->y = default_text_posn;