Fixed various cancle flags to act properly.

progress.lua

@@ -34,7 +34,7 @@ end
 local function DL_progress(YtLink)  
   downloadStart(YtLink) 		  
   downloadProgress.value = 0  
-  local pipe = io.popen("youtube-dl " ..YtLink)
+  local pipe = io.popen("youtube-dl " ..YtLink )
   repeat
     local c = pipe:read(20)	  -- read the first 20 characters of each line
     if c then 		
@@ -49,7 +49,10 @@ local function DL_progress(YtLink)
         if cancelflag then  
           iup.Message("Terminated", "You have canceled the download") 
           iup.Flush()
-          break 
+          pipe:close()
+          iup.Flush()
+          return false
+           
         end
 
       end
@@ -60,10 +63,12 @@ local function DL_progress(YtLink)
 
   until not c
   pipe:close()
+ return true 
 end
 
 popin = {}
 popin.ytdl = function(tubeLink)
-  DL_progress(tubeLink)
+local flag =  DL_progress(tubeLink)
+  if not flag then return false else return true end
 end