Added checks for unexisting thumbnail sources

src/ThumbnailGenerators/FlashThumbnailGenerator.php

@@ -3,6 +3,9 @@ class FlashThumbnailGenerator implements IThumbnailGenerator
 {
 	public function generateFromFile($srcPath, $dstPath, $width, $height)
 	{
+		if (!file_exists($srcPath))
+			return false;
+
 		$tmpPath = tempnam(sys_get_temp_dir(), 'thumb') . '.png';
 
 		$cmd = sprintf(

src/ThumbnailGenerators/ImageGdThumbnailGenerator.php

@@ -3,6 +3,9 @@ class ImageGdThumbnailGenerator implements IThumbnailGenerator
 {
 	public function generateFromFile($srcPath, $dstPath, $width, $height)
 	{
+		if (!file_exists($srcPath))
+			return false;
+
 		$mime = mime_content_type($srcPath);
 
 		switch ($mime)

src/ThumbnailGenerators/ImageImagickThumbnailGenerator.php

@@ -3,6 +3,9 @@ class ImageImagickThumbnailGenerator implements IThumbnailGenerator
 {
 	public function generateFromFile($srcPath, $dstPath, $width, $height)
 	{
+		if (!file_exists($srcPath))
+			return false;
+
 		$image = new Imagick($srcPath);
 		$image = $image->coalesceImages();
 

src/ThumbnailGenerators/SmartThumbnailGenerator.php

@@ -26,6 +26,9 @@ class SmartThumbnailGenerator implements IThumbnailGenerator
 
 	public function generateFromFile($srcPath, $dstPath, $width, $height)
 	{
+		if (!file_exists($srcPath))
+			return false;
+
 		$mime = mime_content_type($srcPath);
 
 		switch ($mime)

src/ThumbnailGenerators/VideoThumbnailGenerator.php

@@ -3,6 +3,9 @@ class VideoThumbnailGenerator implements IThumbnailGenerator
 {
 	public function generateFromFile($srcPath, $dstPath, $width, $height)
 	{
+		if (!file_exists($srcPath))
+			return false;
+
 		$tmpPath = tempnam(sys_get_temp_dir(), 'thumb') . '.jpg';
 
 		$cmd = sprintf(