cmdutils: fix implicit declaration of SetDllDirectory function

Signed-off-by: Tobias Rapp <t.rapp@noa-archive.com>
Signed-off-by: James Almer <jamrial@gmail.com>

cmdutils.c

@@ -61,6 +61,9 @@
 #include <sys/time.h>
 #include <sys/resource.h>
 #endif
+#ifdef _WIN32
+#include <windows.h>
+#endif
 
 static int init_report(const char *env);