only check for needed headers.

0BUILD

@@ -147,21 +147,11 @@
 
 
     <checkheaders>
-      locale.h libintl.h iconv.h
+      ctype.h stdio.h unistd.h errno.h
-      fcntl.h stdlib.h string.h unistd.h
-      assert.h ctype.h errno.h fcntl.h stdio.h stdlib.h string.h strings.h locale.h
-      netinet/in.h signal.h
     </checkheaders>
   
   
     <checkfunctions type="c" >
-      setlocale
-      memmove 
-      memset 
-      strcasecmp 
-      strdup 
-      strerror 
-      snprintf
     </checkfunctions>