File claws-mail-extra-plugins-prototypes.diff of Package claws-mail-extra-plugins

--- vcalendar-2.0.4/libical/libical/icalcomponent.c.old
+++ vcalendar-2.0.4/libical/libical/icalcomponent.c
@@ -43,6 +43,7 @@
 #include <errno.h>
 #include <assert.h>
 #include <stdio.h> /* for fprintf */
+#include <string.h>
 
 #define MAX_TMP 1024