windows: change 'more then' to 'more than'

Copy CL 17488 into golang.org/x/sys/windows.

Change-Id: I4c6bf14982dd1fc2b8aa70ec16ad7b7c18e76bae
Reviewed-on: https://go-review.googlesource.com/73353
Reviewed-by: Tim Cooper <tim.cooper@layeh.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

windows/dll_windows.go

@@ -116,7 +116,7 @@ func (p *Proc) Addr() uintptr {
 
 //go:uintptrescapes
 
-// Call executes procedure p with arguments a. It will panic, if more then 15 arguments
+// Call executes procedure p with arguments a. It will panic, if more than 15 arguments
 // are supplied.
 //
 // The returned error is always non-nil, constructed from the result of GetLastError.
@@ -297,7 +297,7 @@ func (p *LazyProc) Addr() uintptr {
 
 //go:uintptrescapes
 
-// Call executes procedure p with arguments a. It will panic, if more then 15 arguments
+// Call executes procedure p with arguments a. It will panic, if more than 15 arguments
 // are supplied. It will also panic if the procedure cannot be found.
 //
 // The returned error is always non-nil, constructed from the result of GetLastError.