patch 8.2.0612: Vim9: no check for space before #comment

Problem:    Vim9: no check for space before #comment.
Solution:   Add space checks.
diff --git a/src/gui.c b/src/gui.c
index cdfc929..5959043 100644
--- a/src/gui.c
+++ b/src/gui.c
@@ -5036,7 +5036,7 @@
 	// of the argument ending up after the shell prompt.
 	msg_clr_eos_force();
 #ifdef GUI_MAY_SPAWN
-	if (!ends_excmd(*eap->arg))
+	if (!ends_excmd2(eap->cmd, eap->arg))
 	    gui_start(eap->arg);
 	else
 #endif
@@ -5045,7 +5045,7 @@
 	channel_gui_register_all();
 #endif
     }
-    if (!ends_excmd(*eap->arg))
+    if (!ends_excmd2(eap->cmd, eap->arg))
 	ex_next(eap);
 }