Minor fixes / changes for Mac compatibility.

Modules/imageop.c

@@ -156,7 +156,7 @@ imageop_tovideo(self, args)
     ncp = (unsigned char *)getstringvalue(rv);
 
     if ( width == 1 ) {
-	bcopy(cp, ncp, maxx);		/* Copy first line */
+	memcpy(ncp, cp, maxx);		/* Copy first line */
 	ncp += maxx;
 	for (y=1; y<maxy; y++) {	/* Interpolate other lines */
 	    for(x=0; x<maxx; x++) {
@@ -165,7 +165,7 @@ imageop_tovideo(self, args)
 	    }
 	}
     } else {
-	bcopy(cp, ncp, maxx*4);		/* Copy first line */
+	memcpy(ncp, cp, maxx*4);		/* Copy first line */
 	ncp += maxx*4;
 	for (y=1; y<maxy; y++) {	/* Interpolate other lines */
 	    for(x=0; x<maxx; x++) {

Objects/dictobject.c

@@ -763,7 +763,7 @@ dictinsert(v, key, item)
 		last_name_object = newstringobject(key);
 		if (last_name_object == NULL) {
 			last_name_char = NULL;
-			return NULL;
+			return -1;
 		}
 		last_name_char = key;
 	}
@@ -780,7 +780,7 @@ dictremove(v, key)
 		last_name_object = newstringobject(key);
 		if (last_name_object == NULL) {
 			last_name_char = NULL;
-			return NULL;
+			return -1;
 		}
 		last_name_char = key;
 	}

Objects/listobject.c

@@ -442,7 +442,7 @@ setlistslice(a, ilow, ihigh, v)
 {
 	if (!is_listobject(a)) {
 		err_badcall();
-		return NULL;
+		return -1;
 	}
 	return list_ass_slice((listobject *)a, ilow, ihigh, v);
 }

Objects/mappingobject.c

@@ -763,7 +763,7 @@ dictinsert(v, key, item)
 		last_name_object = newstringobject(key);
 		if (last_name_object == NULL) {
 			last_name_char = NULL;
-			return NULL;
+			return -1;
 		}
 		last_name_char = key;
 	}
@@ -780,7 +780,7 @@ dictremove(v, key)
 		last_name_object = newstringobject(key);
 		if (last_name_object == NULL) {
 			last_name_char = NULL;
-			return NULL;
+			return -1;
 		}
 		last_name_char = key;
 	}