fix some calls to equals that were passing the wrong type (found by FindBugs)

h2/src/test/org/h2/test/db/TestDateStorage.java

@@ -76,7 +76,7 @@ public class TestDateStorage extends TestBase {
             printTime("inserted");
             for (TimeZone target : distinct) {
                 println("select from " + target.getID());
-                if ("Pacific/Kiritimati".equals(target)) {
+                if ("Pacific/Kiritimati".equals(target.getID())) {
                     // there is a problem with this time zone, but it seems
                     // unrelated to this database (possibly wrong timezone
                     // information?)

h2/src/test/org/h2/test/unit/TestDate.java

@@ -417,7 +417,7 @@ public class TestDate extends TestBase {
                 d.writeValue(ValueNull.INSTANCE);
                 d.reset();
                 for (TimeZone target : distinct) {
-                    if ("Pacific/Kiritimati".equals(target)) {
+                    if ("Pacific/Kiritimati".equals(target.getID())) {
                         // there is a problem with this time zone, but it seems
                         // unrelated to this database (possibly wrong timezone
                         // information?)

h2/src/tools/org/h2/dev/store/btree/ChangeCursor.java

@@ -104,7 +104,7 @@ public class ChangeCursor<K, V> implements Iterator<K> {
                         break;
                     }
                     pos2 = pos2.parent;
-                    if (pos2 == null || !pos1.page.equals(pos2.page.getPos())) {
+                    if (pos2 == null || !pos1.page.equals(pos2.page)) {
                         if (pos1.index + 1 < map.getChildPageCount(pos1.page)) {
                             pos1 = new CursorPos(pos1.page.getChildPage(++pos1.index), 0, pos1);
                             pos1 = min(pos1);
@@ -147,7 +147,7 @@ public class ChangeCursor<K, V> implements Iterator<K> {
                             break;
                         }
                         pos1 = pos1.parent;
-                        if (pos1 == null || !pos2.page.equals(pos1.page.getPos())) {
+                        if (pos1 == null || !pos2.page.equals(pos1.page)) {
                             if (pos2.index + 1 < map.getChildPageCount(pos2.page)) {
                                 pos2 = new CursorPos(pos2.page.getChildPage(++pos2.index), 0, pos2);
                                 pos2 = min(pos2);