Add null pointer check for NC_hashmap table allocation

Author: dkjsone

libdispatch/nchashmap.c

@@ -186,6 +186,7 @@ NC_hashmapnew(size_t startsize)
 	if(startsize == 0) {nullfree(hm); return 0;}
     }
     hm->table = (NC_hentry*)calloc(sizeof(NC_hentry), (size_t)startsize);
+    if(hm->table == NULL) {nullfree(hm);return 0;}
     hm->alloc = startsize;
     hm->active = 0;
     return hm;

libsrc/v1hpg.c

@@ -1203,6 +1203,8 @@ v1h_get_NC_vararray(v1hs *gsp, NC_vararray *ncap)
 	ncap->nalloc = ncap->nelems;
 
 	ncap->hashmap = NC_hashmapnew(ncap->nelems);
+	if (ncap->hashmap == NULL)
+		return NC_ENOMEM;
 	{
 		NC_var **vpp = ncap->value;
 		NC_var *const *const end = &vpp[ncap->nelems];