cmd: Reset ignoreBracket when moving to the next line.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=55528

programs/cmd/tests/test_builtins.cmd

@@ -1276,9 +1276,21 @@ if ""=="" for %%i in (A) DO (echo %%i)
 if not ""=="" for %%i in (B) DO (echo %%i)
 
 echo ------------ Testing if/set ------------
+rem a left parenthesis is part of the value, not the start of an 'if' block
 set x=C:\Program Files (x86)
 if ""=="" set y=%x%\dummy
 echo %y%
+if 1 == 1 set z= (
+echo '%z%'
+rem 'set' in one-line 'if' statement does not interfere with other 'if' blocks
+setlocal enableDelayedExpansion
+if 1 == 1 (
+    if 1 == 1 set z=zeta
+    if 1 == 1 (
+         echo !z!
+    )
+)
+endlocal
 
 echo --- Testing if + var subst in delayed expansion mode
 setlocal enableDelayedExpansion

programs/cmd/tests/test_builtins.cmd.exp

@@ -928,6 +928,8 @@ x@space@
 A
 ------------ Testing if/set ------------
 C:\Program Files (x86)\dummy
+' ('
+zeta
 --- Testing if + var subst in delayed expansion mode
 [DEBUG] checking {abc}
 [DEBUG] checking {10.0}

programs/cmd/wcmdmain.c

@@ -2302,6 +2302,7 @@ WCHAR *WCMD_ReadAndParseLine(const WCHAR *optionalcmd, CMD_LIST **output, HANDLE
 
         WINE_TRACE("Need to read more data as outstanding brackets or carets\n");
         inOneLine = FALSE;
+        ignoreBracket = FALSE;
         prevDelim = CMD_NONE;
         inQuotes = 0;
         memset(extraSpace, 0x00, (MAXSTRING+1) * sizeof(WCHAR));