fix first time image loading error

apps/gallery/lib/managers.php

@@ -26,10 +26,8 @@ class DatabaseManager {
 		if (!$image->loadFromFile($path)) {
 			return false;
 		}
-		\OCP\DB::beginTransaction();
 		$stmt = \OCP\DB::prepare('INSERT INTO *PREFIX*pictures_images_cache (uid_owner, path, width, height) VALUES (?, ?, ?, ?)');
 		$stmt->execute(array(\OCP\USER::getUser(), $path, $image->width(), $image->height()));
-		\OCP\DB::commit();
 		$ret = array('path' => $path, 'width' => $image->width(), 'height' => $image->height());
 		unset($image);
 		return $ret;
@@ -78,9 +76,14 @@ class ThumbnailsManager {
 	
 	public function getThumbnailInfo($path) {
 		$arr = DatabaseManager::getInstance()->getFileData($path);
+		if (!$arr) {
+			$thubnail = $this->getThumbnail($path);
+			unset($thubnail);
+			$arr = DatabaseManager::getInstance()->getFileData($path);
+		}
 		$ret = array('filepath' => $arr['path'],
-								 'width' => $arr['width'],
-								 'height' => $arr['height']);
+					 'width' => $arr['width'],
+					 'height' => $arr['height']);
 		return $ret;
 	}