CComponentsInfoBox: move statement for check of image name

Ensure empty pic object otherwise it can be retained on exit
of paintPicture(), if an instance of Infobox already exists.

supplement to ab59797ae5


Origin commit data
------------------
Commit: d7ce847471
Author: Thilo Graf <dbt@novatux.de>
Date: 2013-04-06 (Sat, 06 Apr 2013)

src/gui/components/cc_item_infobox.cpp

@@ -91,12 +91,16 @@ void CComponentsInfoBox::initVarInfobox()
 
 void CComponentsInfoBox::paintPicture()
 {
-	if (pic_name == "")
-		return;
-
-	//init and set icon paint position
+	//ensure empty pic object
 	if (pic)
 		delete pic;
+	pic = NULL;
+
+	//exit if no image definied
+	if (pic_name == "")
+		return;
+	
+	//init pic object and set icon paint position
 	pic = new CComponentsPicture(x+fr_thickness+x_offset, y+fr_thickness/*+y_offset*/, 0, 0, "");
 	
 	//define icon