Fix tombraider.bfft bug [skip ci]

utils/tombraider.bfft

      */
     unsigned 16 little texture;
 
-    summary vertices[0], " - ", vertices[1], " - ", vertices[2], " - ", vertices[4];
+    summary vertices[0], " - ", vertices[1], " - ", vertices[2], " - ", vertices[3];
 }
 
 // Triangular faces