Missing header noticed by gcc:
 * skype-poll-fix.c:38:9: warning: implicit declaration of function ‘isdigit’ [-Wimplicit-function-declaration]
diff --git a/skype-poll-fix.c b/skype-poll-fix.c
index ccc88a1..fd21ba8 100644
--- a/skype-poll-fix.c
+++ b/skype-poll-fix.c
@@ -2,2 +2,3 @@
 #define _GNU_SOURCE
+#include <ctype.h>
 #include <stdio.h>
@@ -13,3 +14,2 @@
 #include <sys/time.h>
-#include <ctype.h>
 #endif