Fix glitch with automation points

src/gui/editors/AutomationEditor.cpp

@@ -1652,7 +1652,7 @@ float AutomationEditor::getLevel(int y )
 					/ (float)( level_line_y - ( TOP_MARGIN + 2 ) ) :
 			( level_line_y - y ) / (float)m_y_delta ) ) / m_step ) * m_step;
 	// some range-checking-stuff
-	level = qBound( m_bottomLevel, level, m_topLevel );
+	level = qBound(roundf(m_bottomLevel), level, roundf(m_topLevel));
 
 	return( level );
 }