fixup! Stub FreeEnvironmentStringsW to just leak on NT 3.1

Author: mbilker

library/std/src/sys/windows/c.rs

@@ -532,7 +532,7 @@ compat_fn_with_fallback! {
 
     // >= NT 3.5+, 95+
     // https://docs.microsoft.com/en-us/windows/win32/api/processenv/nf-processenv-freeenvironmentstringsw
-    pub fn FreeEnvironmentStringsW(env_ptr: LPWCH) -> BOOL {
+    pub fn FreeEnvironmentStringsW(env_ptr: PCWSTR) -> BOOL {
         // just leak it on NT 3.1
         TRUE
     }