kernel32: Don't clear WINEDEBUG in the debugger process if +winedbg is set.

dlls/kernel32/except.c

@@ -54,6 +54,7 @@
 #include "wine/debug.h"
 
 WINE_DEFAULT_DEBUG_CHANNEL(seh);
+WINE_DECLARE_DEBUG_CHANNEL(winedbg);
 
 static PTOP_LEVEL_EXCEPTION_FILTER top_filter;
 
@@ -289,6 +290,8 @@ static BOOL	start_debugger(PEXCEPTION_POINTERS epointers, HANDLE hEvent)
 
     /* make WINEDEBUG empty in the environment */
     env = GetEnvironmentStringsA();
+    if (!TRACE_ON(winedbg))
+    {
         for (p = env; *p; p += strlen(p) + 1)
         {
             if (!memcmp( p, "WINEDEBUG=", sizeof("WINEDEBUG=")-1 ))
@@ -300,6 +303,7 @@ static BOOL	start_debugger(PEXCEPTION_POINTERS epointers, HANDLE hEvent)
                 break;
             }
         }
+    }
 
     TRACE("Starting debugger %s\n", debugstr_a(cmdline));
     memset(&startup, 0, sizeof(startup));