Floor the value returned by viewPortToCount()

Previously, the value returned by viewPortToCount() could be a decimal number, this floors its value.
Helps in clean requests and caching.
Fix #766

Author: juuz0

static/skin/index.js

@@ -69,7 +69,7 @@
 
     function viewPortToCount(){
         const zoom = Math.floor((( window.outerWidth - 10 ) / window.innerWidth) * 100);
-        return Math.floor(window.innerHeight/(3*zoom) + 1)*(window.innerWidth/(2.5*zoom) + 1);
+        return Math.floor((window.innerHeight/(3*zoom) + 1)*(window.innerWidth/(2.5*zoom) + 1));
     }
 
     function getInnerHtml(node, query) {

test/server.cpp

@@ -319,7 +319,7 @@ R"EXPECTEDRESULT(      src="/ROOT/skin/jquery-ui/external/jquery/jquery.js?cache
           src: url("/ROOT/skin/fonts/Roboto.ttf?cacheid=84d10248") format("truetype");
     <script src="/ROOT/skin/isotope.pkgd.min.js?cacheid=2e48d392" defer></script>
     <script src="/ROOT/skin/iso6391To3.js?cacheid=ecde2bb3"></script>
-    <script type="text/javascript" src="/ROOT/skin/index.js?cacheid=0951f06f" defer></script>
+    <script type="text/javascript" src="/ROOT/skin/index.js?cacheid=b9aafe60" defer></script>
 )EXPECTEDRESULT"
     },
     {