tool_sdecls.h: Fixed compilation warning from commit 4a889441d3

tool_sdecls.h:139 warning: comma at end of enumerator list
diff --git a/src/tool_sdecls.h b/src/tool_sdecls.h
index 9455a25..53aa243 100644
--- a/src/tool_sdecls.h
+++ b/src/tool_sdecls.h
@@ -136,7 +136,7 @@
   HTTPREQ_GET,
   HTTPREQ_HEAD,
   HTTPREQ_FORMPOST,
-  HTTPREQ_SIMPLEPOST,
+  HTTPREQ_SIMPLEPOST
 } HttpReq;