fixes implicit isspace()
--
diff --git a/gweb/gresolv.c b/gweb/gresolv.c
index 954e7cf..78d9bbd 100644
--- a/gweb/gresolv.c
+++ b/gweb/gresolv.c
@@ -23,6 +23,7 @@
 #include <config.h>
 #endif
 
+#include <ctype.h>
 #include <errno.h>
 #include <unistd.h>
 #include <stdarg.h>
