cast return value to void to indicate that we want to ignore the result

src/dump.cpp

@@ -573,7 +573,7 @@ void Dump::openfile()
         nameslist[numfiles] = utils::strdup(filecurrent);
         ++numfiles;
       } else {
-        remove(nameslist[fileidx]);
+        (void) remove(nameslist[fileidx]);
         delete[] nameslist[fileidx];
         nameslist[fileidx] = utils::strdup(filecurrent);
         fileidx = (fileidx + 1) % maxfiles;