winedbg: Write-strings warnings fix.

programs/winedbg/tgt_minidump.c

diff --git a/programs/winedbg/tgt_minidump.c b/programs/winedbg/tgt_minidump.c
index f6cfa63..c1f0b9e 100644
--- a/programs/winedbg/tgt_minidump.c
+++ b/programs/winedbg/tgt_minidump.c
@@ -190,7 +190,8 @@
     if (MiniDumpReadDumpStream(data->mapping, SystemInfoStream, &dir, &stream, &size))
     {
         MINIDUMP_SYSTEM_INFO*   msi = (MINIDUMP_SYSTEM_INFO*)stream;
-        char                    *str, tmp[128];
+        const char *str;
+        char tmp[128];
 
         dbg_printf("WineDbg starting on minidump on pid %lu\n", pid);
         switch (msi->ProcessorArchitecture)