lib/mingle/edge_bundling.c: explicitly cast the results of 'realloc'

This has no effect in C, but this is pre-emptively squashing some warnings that
appear when moving this file to C++.

Gitlab: #2154

diff --git a/lib/mingle/edge_bundling.c b/lib/mingle/edge_bundling.c
index c3877e113ff679c2dfff0882213bf01dd575f222..7f6016b432210354ad66d1da09802f6ab2c65ac0 100644 (file)
--- a/lib/mingle/edge_bundling.c
+++ b/lib/mingle/edge_bundling.c
@@ -409,8 +409,8 @@ static void pedge_print(char *comments, pedge e){
 
 pedge pedge_realloc(pedge e, int n){
   if (n <= e->npoints) return e;
-  e->x = REALLOC(e->x, e->dim*n*sizeof(double));
-  if (e->wgts) e->wgts = REALLOC(e->wgts, (n-1)*sizeof(double));
+  e->x = (double*)REALLOC(e->x, e->dim*n*sizeof(double));
+  if (e->wgts) e->wgts = (double*)REALLOC(e->wgts, (n-1)*sizeof(double));
   e->len = n;
   return e;
 }
@@ -418,12 +418,12 @@ pedge pedge_wgts_realloc(pedge e, int n){
   /* diff from pedge_alloc: allocate wgts if do not exist and initialize to wgt */
   int i;
   if (n <= e->npoints) return e;
-  e->x = REALLOC(e->x, e->dim*n*sizeof(double));
+  e->x = (double*)REALLOC(e->x, e->dim*n*sizeof(double));
   if (!(e->wgts)){
-    e->wgts = REALLOC(e->wgts, (n-1)*sizeof(double));
+    e->wgts = (double*)REALLOC(e->wgts, (n-1)*sizeof(double));
     for (i = 0; i < e->npoints; i++) e->wgts[i] = e->wgt;
   } else {
-    e->wgts = REALLOC(e->wgts, (n-1)*sizeof(double));
+    e->wgts = (double*)REALLOC(e->wgts, (n-1)*sizeof(double));
   }
   e->len = n;
   return e;
@@ -439,7 +439,7 @@ pedge pedge_double(pedge e){
   assert(npoints >= 2);
   if (npoints*2-1 > len){
     len = 3*npoints;
-    e->x = REALLOC(e->x, dim*len*sizeof(double));
+    e->x = (double*)REALLOC(e->x, dim*len*sizeof(double));
   }
   x = e->x;