fixes #155 @1h

Author: HerbertKoelman

src/mutex.cpp

@@ -38,6 +38,8 @@ namespace pthread {
         } else {
             throw mutex_exception("pthread_mutex_trylock failed, already locked.", rc);
         }
+
+        return status ;
     }
 
     void mutex::unlock() {

tests/exceptions_tests.cpp

@@ -59,7 +59,7 @@ TEST(exceptions, timeout_exception) {
     try {
         throw pthread::timeout_exception("Timeout exception test.");
     } catch (pthread::pthread_exception &ex) {
-        EXPECT_EQ(60, ex.pthread_errno());
+        EXPECT_EQ(ETIMEDOUT, ex.pthread_errno());
         EXPECT_STREQ("Timeout exception test.", ex.what());
     }
 }