review 2/2: Use generic query to make the code more readable.

Suggested by @cdecker.

P.S: Also this include an API refactoring from my previous solution, also this it is suggested by @cdecker.

Signed-off-by: Vincenzo Palazzo <vincenzopalazzodev@gmail.com>

doc/lightning-listsendpays.7.md

@@ -4,15 +4,15 @@ lightning-listsendpays -- Low-level command for querying sendpay status
 SYNOPSIS
 --------
 
-**listsendpays** \[*bolt11*\] \[*payment\_hash*\] [\*status*\]
+**listsendpays** \[*bolt11*\] \[*payment\_hash*\] \[*status*\]
 
 DESCRIPTION
 -----------
 
 The **listsendpays** RPC command gets the status of all *sendpay*
 commands (which is also used by the *pay* command), or with *bolt11* or
 *payment\_hash* limits results to that specific payment. You cannot
-specify both. It is possible filter the payments also by status.
+specify both. It is possible filter the payments also by *status*.
 
 Note that in future there may be more than one concurrent *sendpay*
 command per *pay*, so this command should be used with caution.

wallet/db.c

@@ -1697,7 +1697,7 @@ void db_bind_preimage(struct db_stmt *stmt, int pos, const struct preimage *p)
 
 void db_bind_sha256(struct db_stmt *stmt, int pos, const struct sha256 *s)
 {
-	db_bind_blob(stmt, pos, s->u.u8, sizeof(struct sha256));
+        db_bind_blob(stmt, pos, s->u.u8, sizeof(struct sha256));
 }
 
 void db_bind_sha256d(struct db_stmt *stmt, int pos, const struct sha256_double *s)