jscript: Sign-compare warnings fix

[Andrew Talbot]

Changelog:
    jscript: Sign-compare warnings fix.

diff --git a/dlls/jscript/jscript_main.c b/dlls/jscript/jscript_main.c
index 92999fb..7cb46bf 100644
--- a/dlls/jscript/jscript_main.c
+++ b/dlls/jscript/jscript_main.c
@@ -161,7 +161,7 @@ static HRESULT register_inf(BOOL doregister)
     STRTABLEA strtable;
     STRENTRYA pse[7];
     static CLSID const *clsids[7];
-    int i = 0;
+    unsigned int i = 0;
 
     static const WCHAR advpackW[] = {'a','d','v','p','a','c','k','.','d','l','l',0};