Fix white balance uninitialized at start

imagescrollareagl.cpp

@@ -103,6 +103,7 @@ void ImageWidget::setImage(std::shared_ptr<RawImage> image, int index)
     m_imgWidth = image->width();
     m_imgHeight = image->height();
     m_currentImg = index;
+    m_whiteBalance[0] = m_whiteBalance[1] = m_whiteBalance[2] = 1.0f;
 
     if(!m_image)return;
 

imagescrollareagl.h

@@ -52,7 +52,7 @@ class ImageWidget : public QOpenGLWidget
     float m_range;
     float m_dx, m_dy;
     float m_scale;
-    float m_whiteBalance[3];
+    float m_whiteBalance[3] = {1.0f, 1.0f, 1.0f};
     bool m_blockRepaint;
     bool m_bwImg;
     bool m_invert;