MAINT Remove -Wsign-compare compilation warning for _radius_neighbors.pyx.tp (#27061)

ChVeen · jeremiedbb · commit d0671b2d8d3e · 2023-09-20T14:40:31.000+02:00
diff --git a/sklearn/metrics/_pairwise_distances_reduction/_radius_neighbors.pyx.tp b/sklearn/metrics/_pairwise_distances_reduction/_radius_neighbors.pyx.tp
@@ -300,7 +300,8 @@ cdef class RadiusNeighbors{{name_suffix}}(BaseDistancesReduction{{name_suffix}})
     cdef void compute_exact_distances(self) noexcept nogil:
         """Convert rank-preserving distances to pairwise distances in parallel."""
         cdef:
-            intp_t i, j
+            intp_t i
+            vector[intp_t].size_type j
 
         for i in prange(self.n_samples_X, nogil=True, schedule='static',
                         num_threads=self.effective_n_threads):
