use for(;;) instead of while(1) to muffle some visual-C warnings

src/xspice/evt/evtbackup.c

@@ -163,7 +163,7 @@ static void EVTbackup_node_data(
         /* for tail, and splice later data into the free list */
         node_ptr = node_data->last_step[node_index];
         node = *node_ptr;
-        while(1) {
+        for (;;) {
             if((node->next == NULL) || (node->next->step > new_time)) {
 
                 /* Splice rest of list, if any, into free list */
@@ -252,7 +252,7 @@ static void EVTbackup_state_data(
         /* for tail, and splice later data into the free list */
         state_ptr = state_data->last_step[inst_index];
         state = *state_ptr;
-        while(1) {
+        for (;;) {
             if((state->next == NULL) || (state->next->step > new_time)) {
 
                 /* Splice rest of list, if any, into free list */
@@ -333,7 +333,7 @@ static void EVTbackup_msg_data(
         /* for tail, and splice later data into the free list */
         msg_ptr = msg_data->last_step[port_index];
         msg = *msg_ptr;
-        while(1) {
+        for (;;) {
             if((msg->next == NULL) || (msg->next->step > new_time)) {
 
                 /* Splice rest of list, if any, into free list */

src/xspice/ipc/ipcaegis.c

@@ -157,7 +157,7 @@ Ipc_Status_t ipc_transport_get_line (str, len, wait)
    assert ((mbx_state == IPC_MBX_CONNECTED_TO_CLIENT) ||
            (mbx_state == IPC_MBX_INITIALIZED));
    
-   do {
+   for (;;) {
       if (wait == IPC_WAIT) {
          mbx_$get_rec (mbx_handle, &mbx_recieve_msg_buf, mbx_$serv_msg_max,
                        &mbx_ret_ptr, &mbx_ret_len, &status);
@@ -231,7 +231,7 @@ Ipc_Status_t ipc_transport_get_line (str, len, wait)
          fprintf (stderr, "ERROR: IPC: Bad message type (0x%x) recieved\n",
                   mbx_ret_ptr->mt);
       }
-   } while (1); 
+   }
    return IPC_STATUS_ERROR;
 }
  

src/xspice/mif/mifgetvalue.c

@@ -126,7 +126,7 @@ MIFgetValue (
 
     /* now get the values into val */
 
-    while(1) {
+    for (;;) {
 
         token = MIFget_token(line, &token_type);
 

src/xspice/mif/miftrunc.c

@@ -193,7 +193,7 @@ static void MIFterr(
         deltmp[i] = ckt->CKTdeltaOld[i];
     }
     j = ckt->CKTorder;
-    while(1) {
+    for (;;) {
         for(i=0;i <= j;i++) {
             diff[i] = (diff[i] - diff[i+1])/deltmp[i];
         }