fix missing 'extern' for SSIM function in dsp/
Change-Id: Id8143120f01065dc088f4e90bd930f8ea7c3ae5a
diff --git a/src/dsp/dsp.h b/src/dsp/dsp.h
index 3657f95..10a949e 100644
--- a/src/dsp/dsp.h
+++ b/src/dsp/dsp.h
@@ -238,8 +238,8 @@
const uint8_t* src2, int stride2,
VP8DistoStats* const stats);
-VP8SSIMAccumulateFunc VP8SSIMAccumulate; // unclipped / unchecked
-VP8SSIMAccumulateClippedFunc VP8SSIMAccumulateClipped; // with clipping
+extern VP8SSIMAccumulateFunc VP8SSIMAccumulate; // unclipped / unchecked
+extern VP8SSIMAccumulateClippedFunc VP8SSIMAccumulateClipped; // with clipping
// must be called before using any of the above directly
void VP8SSIMDspInit(void);