libmount: fix potential null pointer dereference

This is false positive warning, but lets silence it so that if and when
warnings crop up they are easy to notice and take seriously.

libmount/src/optstr.c:354:29: warning: potential null pointer dereference
[-Wnull-dereference]

Signed-off-by: Sami Kerola <kerolasa@iki.fi>

diff --git a/libmount/src/optstr.c b/libmount/src/optstr.c
index c0f438fe2e2a77598daaee1d4e98eea33bcdd614..49fc9cc40e6d9fddf72f7f99511760bd22893bd9 100644 (file)
--- a/libmount/src/optstr.c
+++ b/libmount/src/optstr.c
@@ -351,7 +351,9 @@ int mnt_optstr_deduplicate_option(char **optstr, const char *name)
                        end = ol.end;
                        opt = end && *end ? end + 1 : NULL;
                }
-       } while (rc == 0 && opt && *opt);
+               if (opt == NULL)
+                       break;
+       } while (rc == 0 && *opt);
 
        return rc < 0 ? rc : begin ? 0 : 1;
 }