Bug 759640 - Fix typo in feBlend reftest. r=longsonr

layout/reftests/svg/filters/feBlend-1-ref.svg

@@ -1,7 +1,7 @@
 <svg xmlns="http://www.w3.org/2000/svg">
 
 <rect x="10" y="10" width="80" height="80" fill="#00ff00"/>
-<rect x="110" y="10" width="80" height="80" fill="#00ff00"/>
+<rect x="110" y="10" width="80" height="80" fill="#000000"/>
 <rect x="210" y="10" width="80" height="80" fill="#ffff00"/>
 <rect x="310" y="10" width="80" height="80" fill="#000000"/>
 <rect x="410" y="10" width="80" height="80" fill="#ffff00"/>

layout/reftests/svg/filters/feBlend-1.svg

@@ -10,7 +10,7 @@
 <filter id="f2" filterUnits="objectBoundingBox" primitiveUnits="objectBoundingBox" 
          x="0%" y="0%" width="100%" height="100%">
   <feFlood flood-color="#ff0000" result="flood"/>
-  <feBlend mode="mutiply" in="SourceGraphic" in2="flood" x="10%" y="10%" width="80%" height="80%"/>
+  <feBlend mode="multiply" in="SourceGraphic" in2="flood" x="10%" y="10%" width="80%" height="80%"/>
 </filter>
 <rect x="100" y="0" width="100" height="100" fill="#00ff00" filter="url(#f2)"/>