xcap_client: typos a/an

src/modules/xcap_client/doc/xcap_client_admin.xml

@@ -34,7 +34,7 @@
 	</para>
 	<para>
 	The update method is also configurable, either through periodical
-	queries, applicable to any kind of XCAP server or with an management command 
+	queries, applicable to any kind of XCAP server or with a management command 
 	that should be sent by the server upon an update.
 	</para>
 	<para>

src/modules/xcap_client/xcap_callbacks.h

@@ -55,7 +55,7 @@ void destroy_xcapcb_list(void);
 /* register a callback for several types of events */
 int register_xcapcb( int types, xcap_cb f);
 
-/* run all transaction callbacks for an composed type */
+/* run all transaction callbacks for a composed type */
 void run_xcap_update_cb(int type, str xid, char* stream);
 
 #endif