do the in_addr_t stuff correctly...

configure.ac

@@ -232,8 +232,9 @@ AC_CACHE_CHECK([for in_addr_t],
                                         [inaddrt=yes],
                                         [inaddrt=no]),
         ])
+AH_TEMPLATE(NEED_INADDR_T, [Need a typedef for in_addr_t])
 if test $inaddrt = no ; then
-  AC_CHECK_TYPE(in_addr_t, uint32_t)
+  AC_DEFINE(NEED_INADDR_T)
 fi
 
 # Checks for library functions.

rfb/rfbproto.h

@@ -84,6 +84,10 @@ typedef int8_t rfbBool;
 typedef uint32_t rfbKeySym;
 typedef uint32_t rfbPixel;
 
+#ifdef LIBVNCSERVER_NEED_INADDR_T
+typedef uint32_t in_addr_t;
+#endif
+
 #ifndef INADDR_NONE
 #define                INADDR_NONE     ((in_addr_t) 0xffffffff)
 #endif