- only quit Bochs simulation after pressing the "Quit" button in the runtime

config dialog. Now the close button and the ESC key let the simulation
  continue in the runtime case (fixes SF bug #3510403).

bochs/gui/win32dialog.cc

@@ -631,7 +631,12 @@ static BOOL CALLBACK MainMenuDlgProc(HWND hDlg, UINT msg, WPARAM wParam, LPARAM
       SetFocus(GetDlgItem(hDlg, choice));
       return FALSE;
     case WM_CLOSE:
-      EndDialog(hDlg, -1);
+      if (runtime) {
+        EndDialog(hDlg, 1);
+      } else {
+        bx_user_quit = 1;
+        EndDialog(hDlg, -1);
+      }
       break;
     case WM_COMMAND:
       code = HIWORD(wParam);
@@ -708,6 +713,11 @@ static BOOL CALLBACK MainMenuDlgProc(HWND hDlg, UINT msg, WPARAM wParam, LPARAM
           EndDialog(hDlg, 1);
           break;
         case IDCANCEL:
+          if (runtime) {
+            EndDialog(hDlg, 1);
+            break;
+          }
+        case IDQUIT:
           bx_user_quit = 1;
           EndDialog(hDlg, -1);
           break;

bochs/gui/win32res.h

@@ -10,6 +10,7 @@
 #define IDEDITBOX    1170
 #define IDSIMU       1180
 #define IDRESTORE    1190
+#define IDQUIT       1195
 #define LOGOPT_DLG   1200
 #define IDDEVLIST    1210
 #define IDLOGLBL1    1221

bochs/win32res.rc

@@ -68,7 +68,7 @@ BEGIN
     GROUPBOX        "Simulation", IDSIMU, 195, 10, 70, 77
     DEFPUSHBUTTON   "Sta&rt", IDOK, 205, 25, 50, 14
     PUSHBUTTON      "Restore St&ate", IDRESTORE, 205, 45, 50, 14
-    PUSHBUTTON      "&Quit", IDCANCEL, 205, 65, 50, 14
+    PUSHBUTTON      "&Quit", IDQUIT, 205, 65, 50, 14
 END
 
 LOGOPT_DLG DIALOG 30, 30, 240, 180