cmd: Fix 'else', with tests.

programs/cmd/builtins.c

@@ -1072,7 +1072,7 @@ void WCMD_part_execute(CMD_LIST **cmdList, WCHAR *firstcmd, WCHAR *variable,
       /* Execute any statements appended to the line */
       /* FIXME: Only if previous call worked for && or failed for || */
       if ((*cmdList)->prevDelim == CMD_ONFAILURE ||
-          (*cmdList)->prevDelim != CMD_ONSUCCESS) {
+          (*cmdList)->prevDelim == CMD_ONSUCCESS) {
         if (processThese && (*cmdList)->command) {
           WCMD_execute ((*cmdList)->command, (*cmdList)->redirects, variable,
                         value, cmdList);

programs/cmd/tests/test_builtins.cmd

@@ -23,3 +23,16 @@ cd dummydir
 echo %~dp0
 cd ..
 rmdir dummydir
+
+echo ------------ Testing if/else --------------
+echo if/else should work with blocks
+if 0 == 0 (
+  echo if seems to work
+) else (
+  echo if seems to be broken
+)
+if 1 == 0 (
+  echo else seems to be broken
+) else (
+  echo else seems to work
+)

programs/cmd/tests/test_builtins.cmd.exp

@@ -16,3 +16,7 @@ bar
 ~dp0 should be directory containing batch file
 @pwd@\
 @pwd@\
+------------ Testing if/else --------------
+if/else should work with blocks
+if seems to work
+else seems to work