prevent warning from that picky MIPSpro compiler

lib/version.c

@@ -95,15 +95,15 @@ char *curl_version(void)
 {
   static char version[200];
   char *ptr;
-  long num;
   strcpy(version, LIBCURL_NAME "/" LIBCURL_VERSION );
   ptr=strchr(version, '\0');
 
 #ifdef USE_SSLEAY
+  {
+    long num;
     getssl_version(ptr, &num);
     ptr=strchr(version, '\0');
-#else
-  (void)num; /* no compiler warning please */
+  }
 #endif
 
 #ifdef HAVE_KRB4