fix, bad gutter icon displayed on breakpoint removed

CHANGELOG.md

@@ -7,6 +7,7 @@
 ## Bugs fixed
 
 - diff dialog: the content reloaded matched to the state when the dialog was shown, not when closed. (#97)
+- editor, debugging: during a debugging session, wrong icon displayed when a breakpoint is removed.
 
 # v3.9.12
 

src/u_synmemo.pas

@@ -3992,7 +3992,7 @@ begin
     m := marks.Line[line];
   if m.isAssigned then
     for i := 0 to m.count - 1 do
-      if (m[i].ImageIndex = integer(value)) then
+      if m[i].Visible and (m[i].ImageIndex = integer(value)) then
         exit(true);
 end;