Fix test cases and enable them.

regress/Makefile.am

diff --git a/regress/Makefile.am b/regress/Makefile.am
index 1317fad..ff7236e 100644
--- a/regress/Makefile.am
+++ b/regress/Makefile.am
@@ -130,6 +130,7 @@
 	extra_count.test \
 	extra_count_by_id.test \
 	extra_count_ignore_zip64.test \
+	extra_delete.test \
 	extra_delete_by_id.test \
 	extra_get.test \
 	extra_get_by_id.test \
@@ -186,7 +187,6 @@
 	encoding-cp437.test \
 	encoding-cp437-all.test \
 	encoding-utf-8.test \
-	extra_delete.test \
 	open_filename_duplicate.test \
 	open_filename_duplicate_consistency.test \
 	open_filename_duplicate_empty.test \

regress/extra_delete.test

diff --git a/regress/extra_delete.test b/regress/extra_delete.test
index d8f21ff..e2a2344 100644
--- a/regress/extra_delete.test
+++ b/regress/extra_delete.test
@@ -1,9 +1,17 @@
 # delete extra field by index
 program modify
-args encrypt.zip get_extra_by_id 0 2345 0 c get_extra_by_id 0 2345 0 l delete_extra 0 0 cl get_extra_by_id 0 2345 0 c get_extra_by_id 0 2345 0 l
+args encrypt.zip get_extra 0 0 c get_extra 0 1 c get_extra 0 2 c get_extra 0 0 l get_extra 0 1 l get_extra 0 2 l delete_extra 0 2 c delete_extra 0 0 l get_extra 0 0 c get_extra 0 1 c get_extra 0 2 c get_extra 0 0 l get_extra 0 1 l get_extra 0 2 l
 file encrypt.zip encrypt_plus_extra.zip encrypt.zip
-return 0
+return 1
+stdout Extra field 0x5455: len 5, data 0x033dda4c44
+stdout Extra field 0x7855: len 0
 stdout Extra field 0x0929: len 17, data 0x65787472616669656c64636f6e74656e74
 stdout Extra field 0x0929: len 17, data 0x65787472616669656c64636f6e74656e74
-stderr can't get extra field data for file at index 0, extra field id 2345, ef index 0, flags 512: No such file
-stderr can't get extra field data for file at index 0, extra field id 2345, ef index 0, flags 256: No such file
+stdout Extra field 0x5455: len 9, data 0x033dda4c444dda4c44
+stdout Extra field 0x7855: len 4, data 0x64001400
+stdout Extra field 0x5455: len 5, data 0x033dda4c44
+stdout Extra field 0x7855: len 0
+stdout Extra field 0x5455: len 9, data 0x033dda4c444dda4c44
+stdout Extra field 0x7855: len 4, data 0x64001400
+stderr can't get extra field data for file at index 0, extra field 2, flags 512: No such file
+stderr can't get extra field data for file at index 0, extra field 2, flags 256: No such file

regress/extra_delete_by_id.test

diff --git a/regress/extra_delete_by_id.test b/regress/extra_delete_by_id.test
index a314da7..dff30d2 100644
--- a/regress/extra_delete_by_id.test
+++ b/regress/extra_delete_by_id.test
@@ -1,7 +1,7 @@
 # delete extra field by id and index
 program modify
 #args encrypt.zip set_extra 0 2345 65535 cl extrafieldcontent
-args encrypt.zip delete_extra_by_id 0 2345 0 cl get_extra_by_id 0 2345 0 c get_extra_by_id 0 2345 0 l
+args encrypt.zip delete_extra_by_id 0 2345 0 c delete_extra_by_id 0 2345 0 l get_extra_by_id 0 2345 0 c get_extra_by_id 0 2345 0 l
 return 1
 file encrypt.zip encrypt_plus_extra.zip encrypt.zip
 stderr can't get extra field data for file at index 0, extra field id 2345, ef index 0, flags 512: No such file