[libxslt] Minor fixes to configure.js

[Nick Wellnhofer <nwellnhof src gnome org>]

commit 7357f29c3a83aaa4b06bc86a2be36d5eea11201e
Author: Nick Wellnhofer <wellnhofer aevum de>
Date:   Fri Jan 10 18:36:23 2020 +0100

    Minor fixes to configure.js
    
    - Declare local variables
    - Semicolon coding style
    - Remove duplicated option check
    
    Found by lgtm.com

 win32/configure.js | 14 ++++++--------
 1 file changed, 6 insertions(+), 8 deletions(-)
---
diff --git a/win32/configure.js b/win32/configure.js
index 12c99f30..549b942e 100644
--- a/win32/configure.js
+++ b/win32/configure.js
@@ -136,7 +136,7 @@ function usage()
    file included by our makefile. */
 function discoverVersion()
 {
-       var fso, cf, vf, ln, s;
+       var fso, cf, vf, ln, s, m;
        fso = new ActiveXObject("Scripting.FileSystemObject");
        verCvs = "";
        if (useCvsVer && fso.FileExists("..\\CVS\\Entries")) {
@@ -145,8 +145,8 @@ function discoverVersion()
                        ln = cf.ReadLine();
                        s = new String(ln);
                        if (s.search(/^\/ChangeLog\//) != -1) {
-                               iDot = s.indexOf(".");
-                               iSlash = s.indexOf("/", iDot);
+                               var iDot = s.indexOf(".");
+                               var iSlash = s.indexOf("/", iDot);
                                verCvs = "CVS" + s.substring(iDot + 1, iSlash);
                                break;
                        }
@@ -176,13 +176,13 @@ function discoverVersion()
                        verMicroXslt = m[1];
                } else if (s.search(/^LIBEXSLT_MAJOR_VERSION=/) != -1) {
                        vf.WriteLine(s);
-                       verMajorExslt = s.substring(s.indexOf("=") + 1, s.length)
+                       verMajorExslt = s.substring(s.indexOf("=") + 1, s.length);
                } else if(s.search(/^LIBEXSLT_MINOR_VERSION=/) != -1) {
                        vf.WriteLine(s);
-                       verMinorExslt = s.substring(s.indexOf("=") + 1, s.length)
+                       verMinorExslt = s.substring(s.indexOf("=") + 1, s.length);
                } else if(s.search(/^LIBEXSLT_MICRO_VERSION=/) != -1) {
                        vf.WriteLine(s);
-                       verMicroExslt = s.substring(s.indexOf("=") + 1, s.length)
+                       verMicroExslt = s.substring(s.indexOf("=") + 1, s.length);
                }
        }
        cf.Close();
@@ -360,8 +360,6 @@ for (i = 0; (i < WScript.Arguments.length) && (error == 0); i++) {
                        buildStatic = strToBool(arg.substring(opt.length + 1, arg.length));
                else if (opt == "prefix")
                        buildPrefix = arg.substring(opt.length + 1, arg.length);
-               else if (opt == "incdir")
-                       buildIncPrefix = arg.substring(opt.length + 1, arg.length);
                else if (opt == "bindir")
                        buildBinPrefix = arg.substring(opt.length + 1, arg.length);
                else if (opt == "libdir")