P5-2008 fix inches on gores

dist/image-editor.js

@@ -1136,6 +1136,7 @@ function GoreHandler(viewport) {
          * Then round up to get correct number of gores.
          */
         var count  = Math.ceil((bounds.width / step).toFixed(5));
+
         for (var i = 1; i < count; i++) {
             _lines.push(getLine(bounds.left + step * i));
         }
@@ -2237,6 +2238,7 @@ module.exports = assertKeyValuePair;
 function calcCrop(obj, width, height, units) {
     var cropRatio = width / height;
     var objRatio = obj.width / obj.height;
+    var inchToCm = units === "inch" ? 2.54 : 1;
 
     var returnValue = {
         image: obj,
@@ -2259,7 +2261,11 @@ function calcCrop(obj, width, height, units) {
     }
 
     // Pixels per millimeter
-    returnValue.ppmm = returnValue.width / ((returnValue.dim.width * obj.scaleX) * 10);
+    var ppmm = returnValue.width / ((returnValue.dim.width * inchToCm * obj.scaleX) * 10);
+
+    //Round to four decimal places to avoid precision issues. At least 4 decimals is needed though
+    //for correct calculation of number of gores on wide wallpaperes in editor.
+    returnValue.ppmm = Math.round(ppmm * 1e4) / 1e4;
 
     return returnValue;
 }