[linux-pam] PAM_EXTERN isn't needed anymore, but don't remove it to not break lot of external code using it.

[kukuk]

commit 6b12a20c527cb6ced5b8911ea0f1dcdfc6e6f30c
Author: Thorsten Kukuk <kukuk(a)thkukuk.de&gt;
Date:   Tue Mar 29 14:17:34 2016 +0200

    PAM_EXTERN isn't needed anymore, but don't remove it to not break lot of
    external code using it.
    
    * libpam/include/security/pam_modules.h: Readd PAM_EXTERN for compatibility

 libpam/include/security/pam_modules.h |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/libpam/include/security/pam_modules.h
b/libpam/include/security/pam_modules.h
index 37568e9..ec65e3e 100644
--- a/libpam/include/security/pam_modules.h
+++ b/libpam/include/security/pam_modules.h
@@ -75,6 +75,9 @@ int pam_sm_chauthtok(pam_handle_t *pamh, int flags,
 
 #define PAM_DATA_REPLACE   0x20000000     /* used when replacing a data item */
 
+/* PAM_EXTERN isn't needed anymore, but don't remove it to not break
+   lot of external code using it. */
+#define PAM_EXTERN extern
 
 /* take care of any compatibility issues */
 #include <security/_pam_compat.h>