[committed][testsuite] Fix handling of missing section in smaller-than.sh

[Tom de Vries <tdevries@suse.de>]

Hi,

On openSUSE Tumbleweed I run into:
...
Running testsuite/dwz.tests/dwz-tests.exp ...
testsuite/scripts/smaller-than.sh: line 18: 16#: \
  invalid integer constant (error token is "16#")
 ...
FAIL: testsuite/dwz.tests/dwz.sh
...

The relevant line in smaller-than.sh is:
...
     s=$(printf "%d" $((16#$s)))
...

This seems to be due bash (version 5.1.4), which gives:
...
$ echo $((16#))
bash: 16#: invalid integer constant (error token is "16#")
...
while bash on Leap 15.2 (version 4.4.23) gives:
...
$ echo $((16#))
0
...

Fix this by explicitly handling s == "" in proc section_size.

Committed to trunk.

Thanks,
- Tom

[testsuite] Fix handling of missing section in smaller-than.sh

2021-04-07  Tom de Vries  <tdevries@suse.de>

	PR dwz/27694
	* testsuite/scripts/smaller-than.sh (section_size): Handle s == "".

---
 testsuite/scripts/smaller-than.sh | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/testsuite/scripts/smaller-than.sh b/testsuite/scripts/smaller-than.sh
index ab06e3a..3b452dc 100755
--- a/testsuite/scripts/smaller-than.sh
+++ b/testsuite/scripts/smaller-than.sh
@@ -14,6 +14,11 @@ section_size ()
 	    | sed 's/.*\.debug_//' \
 	    | awk '{print $5}')
 
+    if [ "$s" = "" ]; then
+       echo 0
+       return
+    fi
+
     # Convert hex to decimal.
     s=$(printf "%d" $((16#$s)))