Fix two triangles intersect with intersection distances close to zero (…

…#197) (#198)

Inc/DirectXCollision.inl

@@ -4491,7 +4491,7 @@ namespace TriangleTests
 
         // Ensure robustness with co-planar triangles by zeroing small distances.
         uint32_t ADistIsZeroCR;
-        XMVECTOR ADistIsZero = XMVectorGreaterR(&ADistIsZeroCR, g_RayEpsilon, XMVectorAbs(BDist));
+        XMVECTOR ADistIsZero = XMVectorGreaterR(&ADistIsZeroCR, g_RayEpsilon, XMVectorAbs(ADist));
         ADist = XMVectorSelect(ADist, Zero, ADistIsZero);
 
         uint32_t ADistIsLessCR;