more unsigned integer fixes

gridder_cxx.h

@@ -1142,7 +1142,7 @@ template<typename T> void apply_holo
       {
       complex<T> tmp(0);
       size_t cv=0;
-      for (;cv<supp-3; cv+=4)
+      for (;cv+3<supp; cv+=4)
         tmp += ptr[cv  ]*kv[cv  ]
               +ptr[cv+1]*kv[cv+1]
               +ptr[cv+2]*kv[cv+2]
@@ -1162,7 +1162,7 @@ template<typename T> void apply_holo
       {
       complex<T> tmp(r*ku[cu]);
       size_t cv=0;
-      for (;cv<supp-3; cv+=4)
+      for (;cv+3<supp; cv+=4)
         {
         wptr[cv  ] += tmp*kv[cv  ];
         wptr[cv+1] += tmp*kv[cv+1];

test.py

@@ -244,7 +244,7 @@ def test_pickling():
 @pmp("nydirty", (128, 250))
 @pmp("nrow", (1, 39))
 @pmp("nchan", (1, 70))
-@pmp("epsilon", (1e-2, 1e-7, 2e-13))
+@pmp("epsilon", (1e-1, 1e-7, 2e-13))
 @pmp("weight", (True, False))
 def test_applyholo(nxdirty, nydirty, nrow, nchan, epsilon, weight):
     np.random.seed(42)
@@ -263,7 +263,7 @@ def test_applyholo(nxdirty, nydirty, nrow, nchan, epsilon, weight):
 @pmp("nydirty", (250,))
 @pmp("nrow", (10, 100))
 @pmp("nchan", (1, 10))
-@pmp("epsilon", (1e-2, 1e-7))
+@pmp("epsilon", (1e-1, 1e-7))
 @pmp("du", (-2, 0, 1, 4))
 @pmp("dv", (-1, 0, 1))
 @pmp("weight", (True, False))