fix: crash when fetching SLR cover images (xbapps#1841)

* Attempted Fix

* Should Fix Nil Pointer Error

Nested the body close function inside the if else statement for the error. Also moved nested all logic inside this so the body close is still acted upon logic completion.

* go fmt

pkg/scrape/slrstudios.go

@@ -149,28 +149,39 @@ func SexLikeReal(wg *models.ScrapeWG, updateSite bool, knownScenes []string, out
 		// Cover
 		if !isTransScene {
 			appCover := gjson.Get(JsonMetadataA, "thumbnailUrl").String()
-			desktopCover := strings.Replace(gjson.Get(JsonMetadataA, "thumbnailUrl").String(), "app", "desktop", -1)
-			desktopCresp, err := http.Head(desktopCover)
-			if err != nil {
-				log.Errorf("Method Head Failed on desktopCover %s with error %s", desktopCover, err)
-			} else if desktopCresp.StatusCode == 200 {
-				coverURL := desktopCover
-				sc.Covers = append(sc.Covers, coverURL)
-			} else {
-				appCresp, err := http.Head(appCover)
+
+			if appCover != "" {
+
+				desktopCover := strings.Replace(appCover, "app", "desktop", -1)
+				desktopCresp, err := http.Head(desktopCover)
+
 				if err != nil {
-					log.Errorf("Method Head Failed on appCover %s with error %s", appCover, err)
-				} else if appCresp.StatusCode == 200 {
-					coverURL := appCover
-					sc.Covers = append(sc.Covers, coverURL)
+					log.Errorln("Method Head Failed on desktopCover", desktopCover, "with error", err)
 				} else {
-					e.ForEach(`link[as="image"]`, func(id int, e *colly.HTMLElement) {
-						sc.Covers = append(sc.Covers, e.Request.AbsoluteURL(e.Attr("href")))
-					})
+					if desktopCresp.StatusCode == 200 {
+						coverURL := desktopCover
+						sc.Covers = append(sc.Covers, coverURL)
+					} else {
+						appCresp, err := http.Head(appCover)
+						if err != nil {
+							log.Errorln("Method Head Failed on appCover", appCover, "with error", err)
+						} else {
+							if appCresp.StatusCode == 200 {
+								coverURL := appCover
+								sc.Covers = append(sc.Covers, coverURL)
+							} else {
+								e.ForEach(`link[as="image"]`, func(id int, e *colly.HTMLElement) {
+									sc.Covers = append(sc.Covers, e.Request.AbsoluteURL(e.Attr("href")))
+								})
+							}
+							defer appCresp.Body.Close()
+						}
+					}
+					defer desktopCresp.Body.Close()
 				}
-				defer appCresp.Body.Close()
+			} else {
+				log.Errorln("No thumnailURL available")
 			}
-			defer desktopCresp.Body.Close()
 		} else {
 			posterURLFound := false
 			e.ForEach(`script[type="text/javascript"]`, func(id int, e *colly.HTMLElement) {