getopt(): Could leave optind in undefined state if argc == 1

ChangeLog

@@ -6485,4 +6485,6 @@
 	  compiler option when building for a 32-bit target on a native 64-bit
 	  compiler (2014-1-18).
 	* include/ctype.h: Typo in macro name: iscntrol, not iscontrol (2104-1-17)
+	* libc/unistd/lib_getopt.c:  If there are no arguments (argc == 1), then
+	  getopt() make like the optind variable in an undefined state (2014-1-20).
 

libc/unistd/lib_getopt.c

@@ -264,6 +264,10 @@ int getopt(int argc, FAR char *const argv[], FAR const char *optstring)
         return noarg_ret;
     }
 
+  /* Restore the initial, uninitialized state */
+
   g_binitialized = false;
+  optind = 1;
+  optopt = '?';
   return ERROR;
 }