Added check and define for wide char support

Try to figure out if wide character support is available and provide
the necessary define for toxic.

src/chat.c

@@ -2,6 +2,10 @@
  * Toxic -- Tox Curses Client
  */
 
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include <stdlib.h>
 #include <string.h>
 #include <stdint.h>

src/configdir.c

@@ -18,6 +18,10 @@
  *
  */
 
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include <string.h>
 #include <stdlib.h>
 #include <stdio.h>

src/dhtstatus.c

@@ -1,3 +1,7 @@
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include "dhtstatus.h"
 #include "string.h"
 #include "network.h"

src/friendlist.c

@@ -2,6 +2,10 @@
  * Toxic -- Tox Curses Client
  */
 
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include <string.h>
 #include <stdint.h>
 #include <ctype.h>

src/prompt.c

@@ -2,6 +2,10 @@
 * Toxic -- Tox Curses Client
 */
 
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include <stdlib.h>
 #include <string.h>
 #include <ctype.h>

src/windows.c

@@ -1,3 +1,7 @@
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include "friendlist.h"
 #include "prompt.h"
 #include "dhtstatus.h"