return errno when open() fails

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21634 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/add-ons/accelerants/intel_extreme/accelerant.cpp

@@ -12,6 +12,7 @@
 
 #include "utility.h"
 
+#include <errno.h>
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
@@ -243,7 +244,7 @@ intel_clone_accelerant(void *info)
 
 	int fd = open(path, B_READ_WRITE);
 	if (fd < 0)
-		return fd;
+		return errno;
 
 	status_t status = init_common(fd, true);
 	if (status != B_OK)