Fix typos found by Lintian

docs/man/pkexec.xml

@@ -64,7 +64,7 @@
       Upon successful completion, the return value is the return value
       of <replaceable>PROGRAM</replaceable>. If the calling process is
       not authorized or an authorization could not be obtained through
-      authentication or an error occured, <command>pkexec</command>
+      authentication or an error occurred, <command>pkexec</command>
       exits with a return value of 127. If the authorization could not
       be obtained because the user dismissed the authentication
       dialog, <command>pkexec</command> exits with a return value of

src/programs/pkexec.c

@@ -952,7 +952,7 @@ main (int argc, char *argv[])
   /* set close_on_exec on all file descriptors except stdin, stdout, stderr */
   if (!fdwalk (set_close_on_exec, GINT_TO_POINTER (3)))
     {
-      g_printerr ("Error setting close-on-exec for file desriptors\n");
+      g_printerr ("Error setting close-on-exec for file descriptors\n");
       goto out;
     }