Add missing prototypes to header files.

xnm_value_get_binary is used in the test for the public API,
so it's reasonable to assume it's supposed to be exported.

diff --git a/src/xnm.h b/src/xnm.h
index 26c3c45921a96e2f..370797d079dd64be 100644
--- a/src/xnm.h
+++ b/src/xnm.h
@@ -262,6 +262,13 @@ int           xnm_value_get_const_string  (XnmValue *xnm_value_tree,
                                            /* output */
                                            const gchar **const_val_string);
 
+int           xnm_value_get_binary        (XnmValue *xnm_value_tree,
+                                           const char *key,
+                                           // output
+                                           const gchar **buf,
+                                           int *len
+                                           );
+
 /** 
  * This value retrieves a value from an xnm_value and turns it
  * into an integer with atoi().
diff --git a/src/xnm_private.h b/src/xnm_private.h
index 0c1ef695370d9dc0..2bdf0ca24431f5cc 100644
--- a/src/xnm_private.h
+++ b/src/xnm_private.h
@@ -94,6 +94,7 @@ int           xnm_table_get_key         (XnmTable *xnm_table,
                                          // output
                                          XnmValue **ret_xnm_value
                                          );
+const GPtrArray *xnm_table_get_key_list(XnmTable *xnm_table);
 gboolean      xnm_table_has_key         (XnmTable *xnm_table,
                                          const char* key);
 void          xnm_table_set_key_value   (XnmTable *xnm_table,