ntdll: Void functions should not return a value

[Andrew Talbot]

Changelog:
    ntdll: Void functions should not return a value.

diff -urN a/dlls/ntdll/string.c b/dlls/ntdll/string.c
--- a/dlls/ntdll/string.c	2007-03-09 21:49:01.000000000 +0000
+++ b/dlls/ntdll/string.c	2007-04-11 21:26:01.000000000 +0100
@@ -98,7 +98,7 @@
 void __cdecl NTDLL_qsort( void *base, size_t nmemb, size_t size,
                           int(*compar)(const void *, const void *) )
 {
-    return qsort( base, nmemb, size, compar );
+    qsort( base, nmemb, size, compar );
 }