patch 8.2.2281: Vim9: compiled "wincmd" cannot be followed by bar

Problem:    Vim9: compiled "wincmd" cannot be followed by bar.
Solution:   Check for bar after "wincmd". (closes #7599)
diff --git a/src/vim9compile.c b/src/vim9compile.c
index 23da8f2..2a2b44e 100644
--- a/src/vim9compile.c
+++ b/src/vim9compile.c
@@ -7329,6 +7329,20 @@
 	    if (eap->nextcmd != NULL)
 		nextcmd = eap->nextcmd;
 	}
+	else if (eap->cmdidx == CMD_wincmd)
+	{
+	    p = eap->arg;
+	    if (*p != NUL)
+		++p;
+	    if (*p == 'g' || *p == Ctrl_G)
+		++p;
+	    p = skipwhite(p);
+	    if (*p == '|')
+	    {
+		*p = NUL;
+		nextcmd = p + 1;
+	    }
+	}
     }
 
     if (eap->cmdidx == CMD_syntax && STRNCMP(eap->arg, "include ", 8) == 0)