[binutils-gdb] Simplify varobj "change" logic

[Tom Tromey <tromey@sourceware.org>]

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=a80f2680dbf07c713e3d58bc0906b7ed52f911e2

commit a80f2680dbf07c713e3d58bc0906b7ed52f911e2
Author: Tom Tromey <tromey@adacore.com>
Date:   Thu May 26 10:40:32 2022 -0600

    Simplify varobj "change" logic
    
    varobj used to store 'print_value' as a C string, where NULL was a
    valid value, and so it had logic to handle this situation.  However,
    at some point this was changed to be a std::string, and so the code
    can be simplified in this spot.

Diff:
---
 gdb/varobj.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/gdb/varobj.c b/gdb/varobj.c
index 741fdb6a03b..1aca015a21a 100644
--- a/gdb/varobj.c
+++ b/gdb/varobj.c
@@ -1344,11 +1344,8 @@ install_new_value (struct varobj *var, struct value *value, bool initial)
     {
       print_value = varobj_value_get_print_value (var->value.get (),
 						  var->format, var);
-      if ((var->print_value.empty () && !print_value.empty ())
-	  || (!var->print_value.empty () && print_value.empty ())
-	  || (!var->print_value.empty () && !print_value.empty ()
-	      && var->print_value != print_value))
-	  changed = true;
+      if (var->print_value != print_value)
+	changed = true;
     }
   var->print_value = print_value;