Fix #46050: odbc_next_result corrupts prepared resource

When resetting the result's values, we also have to reset its numcols.

Author: cmb69

NEWS

@@ -18,6 +18,7 @@ PHP                                                                        NEWS
     (cmb)
   . Fixed bug #80150 (Failure to fetch error message). (cmb)
   . Fixed bug #80152 (odbc_execute() moves internal pointer of $params). (cmb)
+  . Fixed bug #46050 (odbc_next_result corrupts prepared resource). (cmb)
 
 - OPcache:
   . Fixed bug #80083 (Optimizer pass 6 removes variables used for ibm_db2 data

ext/odbc/php_odbc.c

@@ -2773,6 +2773,7 @@ PHP_FUNCTION(odbc_next_result)
 		}
 		efree(result->values);
 		result->values = NULL;
+		result->numcols = 0;
 	}
 
 	result->fetched = 0;

ext/odbc/tests/bug46050.phpt

@@ -0,0 +1,27 @@
+--TEST--
+Bug #46050 (odbc_next_result corrupts prepared resource)
+--SKIPIF--
+<?php include 'skipif.inc'; ?>
+--FILE--
+<?php
+include __DIR__ . "/config.inc";
+$conn = odbc_connect($dsn, $user, $pass);
+$stmt = odbc_prepare($conn, "SELECT 1");
+var_dump(odbc_execute($stmt));
+var_dump(odbc_fetch_array($stmt));
+var_dump(odbc_next_result($stmt));
+var_dump(odbc_execute($stmt));
+var_dump(odbc_fetch_array($stmt));
+?>
+--EXPECT--
+bool(true)
+array(1) {
+  ["1"]=>
+  string(1) "1"
+}
+bool(false)
+bool(true)
+array(1) {
+  ["1"]=>
+  string(1) "1"
+}