Fix niklasvh#517

Author: niklasvh

dist/html2canvas.js

@@ -1611,7 +1611,7 @@ NodeContainer.prototype.cssList = function(property, index) {
     value = value[index || 0] || value[0] || 'auto';
     value = value.trim().split(' ');
     if (value.length === 1) {
-        value = [value[0], value[0]];
+        value = [value[0], isPercentage(value[0]) ? 'auto' : value[0]];
     }
     return value;
 };

dist/html2canvas.min.js

@@ -121,7 +121,7 @@ NodeContainer.prototype.cssList = function(property, index) {
     value = value[index || 0] || value[0] || 'auto';
     value = value.trim().split(' ');
     if (value.length === 1) {
-        value = [value[0], value[0]];
+        value = [value[0], isPercentage(value[0]) ? 'auto' : value[0]];
     }
     return value;
 };

src/nodecontainer.js

@@ -29,7 +29,7 @@
         .container {
             float: left;
             border: 1px solid black;
-            width: 200px;
+            width: 150px;
             height: 200px;
             background-image: url(../../assets/image.jpg);
             background-size: 34px;
@@ -42,7 +42,7 @@
 <div class="container"></div>
 <div class="container" style="background-repeat: repeat-y"></div>
 <div class="container" style="background-repeat: repeat-x"></div>
-
+<div class="container" style="background-size: 150% auto"></div>
 <div class="horizontal">
     <div style='background-size: cover;'></div>
     <div style='background-size: contain;'></div>