declarations in for loops are only allowed in C99

src/hal/ethernet/bsd/ethernet_bsd.c

@@ -81,7 +81,8 @@ void
 EthernetHandleSet_removeSocket(EthernetHandleSet self, const EthernetSocket sock)
 {
     if ((self != NULL) && (sock != NULL)) {
-        for (unsigned i = 0; i < self->nhandles; i++) {
+        unsigned i;
+        for (i = 0; i < self->nhandles; i++) {
             if (self->handles[i].fd == sock->bpf) {
                 memmove(&self->handles[i], &self->handles[i+1], sizeof(struct pollfd) * (self->nhandles - i - 1));
                 self->nhandles--;

src/hal/ethernet/linux/ethernet_linux.c

@@ -75,7 +75,8 @@ void
 EthernetHandleSet_removeSocket(EthernetHandleSet self, const EthernetSocket sock)
 {
     if ((self != NULL) && (sock != NULL)) {
-        for (unsigned i = 0; i < self->nhandles; i++) {
+        unsigned i;
+        for (i = 0; i < self->nhandles; i++) {
             if (self->handles[i].fd == sock->rawSocket) {
                 memmove(&self->handles[i], &self->handles[i+1], sizeof(struct pollfd) * (self->nhandles - i - 1));
                 self->nhandles--;

src/hal/ethernet/win32/ethernet_win32.c

@@ -151,7 +151,8 @@ EthernetHandleSet_removeSocket(EthernetHandleSet self, const EthernetSocket sock
     if ((self != NULL) && (sock != NULL)) {
         HANDLE h = pcap_getevent(socket->rawSocket);
 
-        for (unsigned i = 0; i < self->nhandles; i++) {
+        unsigned i;
+        for (i = 0; i < self->nhandles; i++) {
             if (self->handles[i] == h) {
                 memmove(&self->handles[i], &self->handles[i+1], sizeof(HANDLE) * (self->nhandles - i - 1));
                 self->nhandles--;