[thumbnail/exrcreator] Add missing include

thumbnail/exrcreator.cpp

@@ -23,6 +23,7 @@
 #include <QImage>
 #include <QFile>
 
+#include <ImfHeader.h>
 #include <ImfInputFile.h>
 #include <ImfPreviewImage.h>
 
@@ -71,8 +72,9 @@ bool EXRCreator::create(const QString &path, int, int, QImage &img)
             if (!img.load( path )) {
                 return false;
             }
-            if (img.depth() != 32)
+            if (img.depth() != 32) {
                 img = img.convertToFormat( QImage::Format_RGB32 );
+            }
             return true;
         } else {
             return false;