Fix typo

As far as I can see, this is only used in the vim->n_ stats, which are,
apparently, not used anywhere.

lib/libvcc/vcc_vmod.h

@@ -31,7 +31,7 @@
 #define STANZA_TBL \
 	STANZA(ALIAS, alias, SYM_ALIAS) \
 	STANZA(CPROTO, cproto, SYM_NONE) \
-	STANZA(EVENT, evant, SYM_NONE) \
+	STANZA(EVENT, event, SYM_NONE) \
 	STANZA(FUNC, func, SYM_FUNC) \
 	STANZA(METHOD, method, SYM_METHOD) \
 	STANZA(OBJ, obj, SYM_OBJECT) \