Try to shorten an #error in address.c

src/lib/net/address.c

@@ -97,7 +97,7 @@
  * work correctly. Bail out here if we've found a platform where AF_UNSPEC
  * isn't 0. */
 #if AF_UNSPEC != 0
-#error We rely on AF_UNSPEC being 0. Let us know about your platform, please!
+#error "We rely on AF_UNSPEC being 0. Yours isn't. Please tell us more!"
 #endif
 CTASSERT(AF_UNSPEC == 0);