winealsa.drv: Avoid endless loop if registry keys are not accessible.

dlls/winealsa.drv/mmdevdrv.c

@@ -719,7 +719,7 @@ static BOOL get_alsa_name_by_guid(GUID *guid, char *name, DWORD name_size, EData
         GUID reg_guid;
 
         key_name_size = sizeof(key_name)/sizeof(WCHAR);
-        if(RegEnumKeyExW(devices_key, i, key_name, &key_name_size, NULL,
+        if(RegEnumKeyExW(devices_key, i++, key_name, &key_name_size, NULL,
                 NULL, NULL, NULL) != ERROR_SUCCESS)
             break;
 
@@ -753,8 +753,6 @@ static BOOL get_alsa_name_by_guid(GUID *guid, char *name, DWORD name_size, EData
         }
 
         RegCloseKey(key);
-
-        ++i;
     }
 
     RegCloseKey(devices_key);