In addon:ScanVendor(): Moved assignment of "added = true" so the scan frame will not appear if there are no results.

diff --git a/Datamine.lua b/Datamine.lua
index c552383..bfb6762 100644
--- a/Datamine.lua
+++ b/Datamine.lua
@@ -1682,9 +1682,8 @@ do
 					if spell_id then
 						local ttscantext = addon:TooltipScanRecipe(spell_id, true, true)

-						added = true
-
 						if ttscantext and ttscantext ~= "" then
+							added = true
 							tinsert(output, ttscantext)
 						end

@@ -1711,6 +1710,7 @@ do
 						end

 						if not found then
+							added = true
 							tinsert(output, "Vendor ID missing from " .. spell_id)
 						end
 					else