Fix problem related to issue 91.

Author: nicolasff

redis.c

@@ -4203,6 +4203,7 @@ PHP_METHOD(Redis, hMget) {
                 /* save context */
                 MAKE_STD_ZVAL(z_keys[i]);
                 *z_keys[i] = **data;
+                convert_to_string(z_keys[i]);
                 zval_copy_ctor(z_keys[i]);
 
                 i++;

tests/TestRedis.php

@@ -1852,6 +1852,9 @@ public function testHashes() {
 	$this->assertTrue(array('x' => '123', 'y' => '456') === $this->redis->hMget('h', array('x', 'y')));
 	$this->assertTrue(array('z' => 'abc') === $this->redis->hMget('h', array('z')));
 	$this->assertTrue(array('x' => '123', 't' => FALSE, 'y' => '456') === $this->redis->hMget('h', array('x', 't', 'y')));
+	$this->assertFalse(array(123 => 'x') === $this->redis->hMget('h', array(123)));
+	$this->assertTrue(array(123 => FALSE) === $this->redis->hMget('h', array(123)));
+
 
 	// hmget/hmset with numeric fields
 	$this->redis->del('h');