oleaut32: Fix a signed/unsigned mismatch.
diff --git a/dlls/oleaut32/olepicture.c b/dlls/oleaut32/olepicture.c
index a7dc158..ca46d01 100644
--- a/dlls/oleaut32/olepicture.c
+++ b/dlls/oleaut32/olepicture.c
@@ -545,7 +545,7 @@
     return E_POINTER;
 
   switch (This->desc.picType) {
-    case PICTYPE_UNINITIALIZED:
+    case (UINT)PICTYPE_UNINITIALIZED:
     case PICTYPE_NONE:
       *phandle = 0;
       hres = S_FALSE;