Fix name space pollution.

ares/ares_getopt.c

@@ -51,7 +51,7 @@
 
 int   opterr = 1,     /* if error message should be printed */
       optind = 1;     /* index into parent argv vector */
-static int optopt;    /* character checked for validity */
+int   optopt = 0;     /* character checked for validity */
 static int optreset;  /* reset getopt */
 char  *optarg;        /* argument associated with option */
 

ares/ares_getopt.h

@@ -33,15 +33,15 @@
 
 int ares_getopt(int nargc, char * const nargv[], const char *ostr);
 
-#if defined(WATT32)
-#undef optarg
-#undef optind
-#undef opterr
-#endif
+#define optarg   ares_optarg
+#define optind   ares_optind
+#define opterr   ares_opterr
+#define optopt   ares_optopt
+#define optreset ares_optreset
 
 extern char *optarg;
 extern int optind;
 extern int opterr;
-
+extern int optopt;
 
 #endif /* ARES_GETOPT_H */