Fix several problems, discovered by "use strict" directive

Author: linev

changes.md

@@ -1,5 +1,9 @@
 # JSROOT changelog
 
+## Changes in 5.2.2
+1. Fix several problems, discovered by "use strict" directive
+
+
 ## Changes in 5.2.1
 1. Fix - correctly handle new TF1 parameter coding convention (#132)
 2. Fix - Check if pad name can be used as element id (#133)

scripts/JSRootCore.js

@@ -89,7 +89,7 @@
    }
 } (function(JSROOT) {
 
-   JSROOT.version = "5.2.1 27/07/2017";
+   JSROOT.version = "5.2.x 2/08/2017";
 
    JSROOT.source_dir = "";
    JSROOT.source_min = false;

scripts/JSRootPainter.js

@@ -11587,7 +11587,7 @@
 
       if (this.start_without_browser) browser_kind = "";
 
-      if (status || browser_kind) prereg = "jq2d;" + prereq;
+      if (status || browser_kind) prereq = "jq2d;" + prereq;
 
       this._topname = GetOption("topname");
 

scripts/JSRootPainter.more.js

@@ -3870,7 +3870,7 @@
             }
 
             var cmd = "M" + xp[iminus] + "," + yp[iminus];
-            for (i = iminus+1;i<=iplus;++i)
+            for (var i=iminus+1;i<=iplus;++i)
                cmd +=  "l" + (xp[i] - xp[i-1]) + "," + (yp[i] - yp[i-1]);
             if (fillcolor !== 'none') cmd += "Z";