s3: Fix Coverity ID 2328: FORWARD_NULL

Make startsmbfilepwent robust against an invalid open type

diff --git a/source3/passdb/pdb_smbpasswd.c b/source3/passdb/pdb_smbpasswd.c
index 8d6ac318cb751ee3344166e921d2c42434d000c3..005c23d34ed41d8c19ad10b878e6845781d057d7 100644 (file)
--- a/source3/passdb/pdb_smbpasswd.c
+++ b/source3/passdb/pdb_smbpasswd.c
@@ -225,6 +225,9 @@ creating file %s\n", pfile));
                                lock_type = F_WRLCK;
                                break;
                        }
+               default:
+                       DEBUG(10, ("Invalid open mode: %d\n", type));
+                       return NULL;
        }
 
        for(race_loop = 0; race_loop < 5; race_loop++) {