Change signalcall to protectedcall in console

Even though they kind of do the same (calling function in protected
mode), @edubart suggested to use a different function for the sake of
readability.

modules/corelib/util.lua

@@ -296,6 +296,16 @@ function numbertoboolean(number)
   end
 end
 
+function protectedcall(func, ...)
+  local status, ret = pcall(func, ...)
+  if status then
+    return ret
+  end
+
+  perror(ret)
+  return false
+end
+
 function signalcall(param, ...)
   if type(param) == 'function' then
     local status, ret = pcall(param, ...)

modules/game_console/console.lua

@@ -694,7 +694,7 @@ function processChannelTabMenu(tab, mousePos, mouseButton)
       table.insert(lines, 1, os.date('\nChannel saved at %a %b %d %H:%M:%S %Y'))
 
       if g_resources.fileExists(filepath) then
-        table.insert(lines, 1, signalcall(g_resources.readFileContents, filepath) or '')
+        table.insert(lines, 1, protectedcall(g_resources.readFileContents, filepath) or '')
       end
 
       g_resources.writeFileContents(filepath, table.concat(lines, '\n'))