Fix null in append.

Author: jdunkerley

std-bits/table/src/main/java/org/enso/table/data/column/builder/BigIntegerBuilder.java

@@ -72,8 +72,9 @@ public boolean accepts(Object o) {
   @Override
   public void append(Object o) {
     ensureSpaceToAppend();
-    if (o instanceof BigInteger value) {
-      data[currentSize++] = value;
+
+    if (o == null) {
+      appendNulls(1);
     } else {
       try {
         data[currentSize++] = NumericConverter.coerceToBigInteger(o);

std-bits/table/src/main/java/org/enso/table/data/column/builder/BoolBuilder.java

@@ -23,7 +23,7 @@ public class BoolBuilder implements BuilderForBoolean, BuilderWithRetyping {
   @Override
   public void append(Object o) {
     if (o == null) {
-      isNothing.set(size);
+      appendNulls(1);
     } else {
       if (o instanceof Boolean b) {
         if (b) {

std-bits/table/src/main/java/org/enso/table/data/column/builder/DoubleBuilder.java

@@ -58,6 +58,11 @@ public StorageType getType() {
 
   @Override
   public void append(Object o) {
+    if (o == null) {
+      appendNulls(1);
+      return;
+    }
+
     double value;
     if (NumericConverter.isFloatLike(o)) {
       value = NumericConverter.coerceToDouble(o);

std-bits/table/src/main/java/org/enso/table/data/column/builder/InferredDoubleBuilder.java

@@ -100,6 +100,11 @@ public void appendLong(long integer) {
 
   @Override
   public void append(Object o) {
+    if (o == null) {
+      appendNulls(1);
+      return;
+    }
+
     if (NumericConverter.isFloatLike(o)) {
       appendDouble(NumericConverter.coerceToDouble(o));
     } else if (NumericConverter.isCoercibleToLong(o)) {

std-bits/table/src/main/java/org/enso/table/data/column/builder/LongBuilder.java

@@ -26,7 +26,7 @@ protected LongBuilder(int initialSize, ProblemAggregator problemAggregator) {
   }
 
   static LongBuilder make(int initialSize, IntegerType type, ProblemAggregator problemAggregator) {
-    if (type.equals(IntegerType.INT_64)) {
+    if (type == null || type.equals(IntegerType.INT_64)) {
       return new LongBuilder(initialSize, problemAggregator);
     } else {
       return new BoundCheckedIntegerBuilder(initialSize, type, problemAggregator);
@@ -144,6 +144,11 @@ public void appendLong(long value) {
 
   @Override
   public void append(Object o) {
+    if (o == null) {
+      appendNulls(1);
+      return;
+    }
+
     Long x = NumericConverter.tryConvertingToLong(o);
     if (x != null) {
       ensureSpaceToAppend();