msi: Fix a memory leak.

dlls/msi/streams.c

diff --git a/dlls/msi/streams.c b/dlls/msi/streams.c
index 8d2e748..28c3093 100644
--- a/dlls/msi/streams.c
+++ b/dlls/msi/streams.c
@@ -505,7 +505,10 @@
             break;
 
         if (stat.type != STGTY_STREAM)
+        {
+            CoTaskMemFree(stat.pwcsName);
             continue;
+        }
 
         /* table streams are not in the _Streams table */
         if (*stat.pwcsName == 0x4840)