Merge pull request #390 from signalwire/apr_filepath

[apr] scan-build: Fix "Argument with 'nonnull' attribute passed null" in file_io/unix/filepath.c

libs/apr/file_io/unix/filepath.c

@@ -139,6 +139,9 @@ APR_DECLARE(apr_status_t) apr_filepath_merge(char **newpath,
         if (rv != APR_SUCCESS)
             return errno;
 
+        if (!getpath)
+            return APR_ENOMEM;
+
         /* XXX: Any kernel subject to goofy, uncanonical results
          * must run the rootpath against the user's given flags.
          * Simplest would be a recursive call to apr_filepath_merge