Obj: use INT32_MAX for NA values

Author: PMeira

src/CAPI/CAPI_Obj.pas

@@ -1715,7 +1715,7 @@ procedure Batch_SetInt32Array(batch: TDSSObjectPtr; batchSize: Integer; Index: I
         // Faster path
         for i := 1 to batchSize do
         begin
-            if (allowNA) or (Value^ <> $80000000) then
+            if (allowNA) or (Value^ <> $7fffffff) then
             begin
                 // check for each element, in case the element is being edited somewhere else
                 singleEdit := not (Flg.EditingActive in batch^.Flags);
@@ -1738,7 +1738,7 @@ procedure Batch_SetInt32Array(batch: TDSSObjectPtr; batchSize: Integer; Index: I
 
     for i := 1 to batchSize do
     begin
-        if (allowNA) or (Value^ <> $80000000) then
+        if (allowNA) or (Value^ <> $7fffffff) then
             batch^.SetInteger(Index, Value^, setterFlags);
         inc(batch);
         inc(Value)

src/Common/DSSClass.pas

@@ -92,7 +92,7 @@ interface
         // for other components if we think it fits.
         AvoidFullRecalc = 1,
 
-        // For batch operations, skip NA values -- values of NaN for float64, INT32_MIN (0x80000000) for int32, null pointers for strings.
+        // For batch operations, skip NA values -- values of NaN for float64, INT32_MAX (0x7fffffff) for int32, null pointers for strings.
         SkipNA = 2,
 
         Reserved3 = 3,