getpart.pm: when no part match, return blank when section ends

tests/getpart.pm

@@ -63,6 +63,10 @@ sub getpartattr {
             }
             last;
         }
+        # detect end of section when part wasn't found
+        elsif((1 ==$inside) && ($_ =~ /^ *\<\/$section\>/)) {
+            last;
+        }
         elsif((2 ==$inside) && ($_ =~ /^ *\<\/$part/)) {
             $inside--;
         }