wined3d: Print an error when drawStridedSlowVs() is called with 0 idxSize and non-NULL idxData (LLVM/Clang).

[Henri Verbeet]

---
 dlls/wined3d/drawprim.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/dlls/wined3d/drawprim.c b/dlls/wined3d/drawprim.c
index b3612bd..545bad1 100644
--- a/dlls/wined3d/drawprim.c
+++ b/dlls/wined3d/drawprim.c
@@ -619,6 +619,9 @@ static void drawStridedSlowVs(IWineD3DDevice *iface, WineDirect3DVertexStridedDa
 
         if (idxSize == 2) pIdxBufS = (const WORD *) idxData;
         else pIdxBufL = (const DWORD *) idxData;
+    } else if (idxData) {
+        ERR("non-NULL idxData with 0 idxSize, this should never happen\n");
+        return;
     }
 
     /* Start drawing in GL */
-- 
1.5.6.4



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