From 7395b1431d5e2160682de273b46252c747ccbf36 Mon Sep 17 00:00:00 2001
From: rpj <rpj>
Date: Sun, 8 May 2005 16:52:50 +0000
Subject: ''

---
 pthread_mutex_lock.c | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'pthread_mutex_lock.c')

diff --git a/pthread_mutex_lock.c b/pthread_mutex_lock.c
index 301f7bf..4ca5c25 100644
--- a/pthread_mutex_lock.c
+++ b/pthread_mutex_lock.c
@@ -49,6 +49,10 @@ pthread_mutex_lock (pthread_mutex_t * mutex)
   /*
    * Let the system deal with invalid pointers.
    */
+  if (*mutex == NULL)
+    {
+      return EINVAL;
+    }
 
   /*
    * We do a quick check to see if we need to do more work
-- 
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