ntdll: Fix some memory leaks (Valgrind).

dlls/ntdll/unix/env.c

@@ -912,7 +912,7 @@ static void rebuild_argv(void)
  */
 static void prepend_argv( const char **args, int count )
 {
-    char **new_argv = malloc( (main_argc + count) * sizeof(*new_argv) );
+    char **new_argv;
     char *p, *end;
     BOOL write_strings = FALSE;
     int i, total = 0, new_argc = main_argc + count - 1;

dlls/ntdll/unix/file.c

@@ -3298,7 +3298,12 @@ static NTSTATUS nt_to_unix_file_name_no_root( const UNICODE_STRING *nameW, char
 
     /* check if prefix exists (except for DOS drives to avoid extra stat calls) */
 
-    if (wcschr( prefix, '/' )) return STATUS_OBJECT_PATH_NOT_FOUND;
+    if (wcschr( prefix, '/' ))
+    {
+        free( unix_name );
+        return STATUS_OBJECT_PATH_NOT_FOUND;
+    }
+
     if (prefix_len != 2 || prefix[1] != ':')
     {
         unix_name[pos] = 0;