intercept: Actually really blacklist it. Like seriously

Signed-off-by: Ikey Doherty <ikey@solus-project.com>

src/intercept/main.c

@@ -231,6 +231,7 @@ char *lsi_blacklist_vendor(const char *name)
                         if (getenv("LSI_DEBUG") && file_exists) {
                                 emit_overriden_lib(name);
                         }
+                        return NULL;
                 }
                 /* Allowed to exist */
                 return (char *)name;