*argc=0 in cargs allowed, when copying area, first undraw cursor ...

cargs.c

@@ -40,6 +40,8 @@ rfbProcessArguments(rfbScreenInfoPtr rfbScreen,int* argc, char *argv[])
 {
     int i,i1;
 
+    if(!argc) return;
+    
     for (i = i1 = 1; i < *argc; i++) {
         if (strcmp(argv[i], "-help") == 0) {
 	    rfbUsage();
@@ -101,6 +103,7 @@ rfbProcessSizeArguments(int* width,int* height,int* bpp,int* argc, char *argv[])
 {
     int i,i1;
 
+    if(!argc) return;
     for (i = i1 = 1; i < *argc-1; i++) {
         if (strcmp(argv[i], "-bpp") == 0) {
                *bpp = atoi(argv[++i]);

main.c

@@ -143,6 +143,8 @@ void rfbDoCopyRegion(rfbScreenInfoPtr rfbScreen,sraRegionPtr copyRegion,int dx,i
     rowstride=rfbScreen->paddedWidthInBytes;
    char *in,*out;
 
+   rfbUndrawCursor(rfbScreen);
+  
    /* copy it, really */
    i = sraRgnGetReverseIterator(copyRegion,dx<0,dy<0);
    while(sraRgnIteratorNext(i,&rect)) {