Move only if image exists

src/freedombone-app-pleroma

@@ -122,7 +122,9 @@ function pleroma_setting_emoji {
     fi
     wget "$image_url" -O "$image_filename"
     if [ ! -f "$image_filename" ]; then
-        mv "${image_filename}.prev" "${image_filename}"
+        if [ -f "${image_filename}.prev" ]; then
+            mv "${image_filename}.prev" "${image_filename}"
+        fi
         return
     fi
     rm "${image_filename}.prev"
@@ -799,7 +801,9 @@ function pleroma_add_emoji {
     fi
     wget "$image_url" -O "$image_filename"
     if [ ! -f "$image_filename" ]; then
-        mv "${image_filename}.prev" "${image_filename}"
+        if [ -f "${image_filename}.prev" ]; then
+            mv "${image_filename}.prev" "${image_filename}"
+        fi
         dialog --title $"Add Custom Emoji" \
                --msgbox $"Unable to download the image" 6 60
         return