File fix4bug1240330.patch of Package gnuplot.38683

commit af96c2c1b20383684b1ec2084dab7936f7053031
Author: Ethan A Merritt <merritt@u.washington.edu>
Date:   Tue Jan 14 20:56:37 2025 -0800

    x11: protect against double fclose() if two errors in a row
    
    Bug 2753

---
 term/x11.trm |    8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

--- term/x11.trm
+++ term/x11.trm	2025-05-13 10:53:54.326956253 +0000
@@ -856,8 +856,9 @@ X11_atexit()
 	/* dont wait(), since they might be -persist */
 	X11_ipc = NULL;
 #ifdef PIPE_IPC
-	close(ipc_back_fd);
-	ipc_back_fd = -1;
+	if (ipc_back_fd >= 0)
+	    close(ipc_back_fd);
+	ipc_back_fd = IPC_BACK_CLOSED;
 #endif
     }
 }
@@ -1412,7 +1413,8 @@ X11_graphics()
 #ifdef PIPE_IPC
     /* if we know the outboard driver has stopped, restart it */
     if (ipc_back_fd == IPC_BACK_CLOSED) {
-	fclose(X11_ipc);
+	if (X11_ipc > 0)
+	    fclose(X11_ipc);
 	X11_ipc = NULL;
 	X11_init();
     }