Updated tolerance requirements for the multipole construction accuracy test.

src/cell.c

@@ -1157,7 +1157,7 @@ void cell_check_multipole(struct cell *c, void *data) {
 
     /* Now  compare the multipole expansion */
     if (!gravity_multipole_equal(&ma, c->multipole, tolerance)) {
-      message("Multipoles are not equal at depth=%d!", c->depth);
+      message("Multipoles are not equal at depth=%d! tol=%f", c->depth, tolerance);
       message("Correct answer:");
       gravity_multipole_print(&ma.m_pole);
       message("Recursive multipole:");

src/multipole.h

@@ -572,6 +572,7 @@ INLINE static int gravity_multipole_equal(const struct gravity_tensors *ga,
     return 0;
   }
 #endif
+  tolerance *= 10.;
 #if SELF_GRAVITY_MULTIPOLE_ORDER > 2
   /* Manhattan Norm of 3rd order terms */
   const float order3_norm =