EXT-6933 FIXED According to behavior in viewer-1.2: minimal price value was changed to 0.

Problem description:
Minimal price value was 1.

Reviewed by Vadim Savchuk at https://codereview.productengine.com/secondlife/r/510/

--HG--
branch : product-engine

indra/newview/skins/default/xui/en/sidepanel_item_info.xml

@@ -395,7 +395,7 @@ top_pad="10"
 			    label_width="75"
 			    left="120"
 			    width="170"
-			    min_val="1"
+			    min_val="0"
 			    height="23"
 			    max_val="999999999"
 			    top_pad="10"/>