common/json: move declaration into correct header.

Reported-by: @ZmnSCPxj
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

common/json.h

@@ -11,6 +11,7 @@
 #define JSMN_STRICT 1
 # include <external/jsmn/jsmn.h>
 
+struct json_escaped;
 struct json_result;
 struct short_channel_id;
 
@@ -80,6 +81,12 @@ struct json_result *new_json_result(const tal_t *ctx);
  */
 void json_add_string(struct json_result *result, const char *fieldname, const char *value);
 
+/* '"fieldname" : "value"' or '"value"' if fieldname is NULL.  String must
+ * already be JSON escaped as necessary. */
+void json_add_escaped_string(struct json_result *result,
+			     const char *fieldname,
+			     const struct json_escaped *esc TAKES);
+
 /* '"fieldname" : literal' or 'literal' if fieldname is NULL*/
 void json_add_literal(struct json_result *result, const char *fieldname,
 		      const char *literal, int len);

common/json_escaped.h

@@ -29,10 +29,6 @@ bool json_escaped_streq(const struct json_escaped *esc, const char *str);
 bool json_escaped_eq(const struct json_escaped *a,
 		     const struct json_escaped *b);
 
-void json_add_escaped_string(struct json_result *result,
-			     const char *fieldname,
-			     const struct json_escaped *esc TAKES);
-
 /* Internal routine for creating json_escaped from bytes. */
 struct json_escaped *json_escaped_string_(const tal_t *ctx,
 					  const void *bytes, size_t len);