tdf#96572 firebird correctly transmit request for NULL

even if column is not nullable

Change-Id: I72ceda68e983125aef26c8f0aacc06320bd16b77

connectivity/source/drivers/firebird/PreparedStatement.cxx

@@ -706,13 +706,13 @@ void OPreparedStatement::setParameterNull(sal_Int32 nParameterIndex,
                                           bool bSetNull)
 {
     XSQLVAR* pVar = m_pInSqlda->sqlvar + (nParameterIndex - 1);
-    if (pVar->sqltype & 1)
+    if (bSetNull)
     {
-        if (bSetNull)
-            *pVar->sqlind = -1;
-        else
-            *pVar->sqlind = 0;
+        pVar->sqltype |= 1;
+        *pVar->sqlind = -1;
     }
+    else
+        *pVar->sqlind = 0;
 }
 
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */

connectivity/source/drivers/firebird/Util.cxx

@@ -254,11 +254,8 @@ void firebird::mallocSQLVAR(XSQLDA* pSqlda)
             assert(false);
             break;
         }
-        if (pVar->sqltype & 1)
-        {
-            /* allocate variable to hold NULL status */
-            pVar->sqlind = static_cast<short *>(malloc(sizeof(short)));
-        }
+        /* allocate variable to hold NULL status */
+        pVar->sqlind = static_cast<short *>(malloc(sizeof(short)));
     }
 }
 
@@ -302,13 +299,10 @@ void firebird::freeSQLVAR(XSQLDA* pSqlda)
             break;
         }
 
-        if (pVar->sqltype & 1)
+        if(pVar->sqlind)
         {
-            if(pVar->sqlind)
-            {
-                free(pVar->sqlind);
-                pVar->sqlind = nullptr;
-            }
+            free(pVar->sqlind);
+            pVar->sqlind = nullptr;
         }
     }
 }