Remove inclusions of <malloc.h>.

Author: petere

src/interfaces/odbc/bind.c

@@ -23,7 +23,6 @@
 #include "qresult.h"
 #include "pgtypes.h"
 #include <stdlib.h>
-#include <malloc.h>
 #include <string.h>
 
 #ifndef WIN32

src/interfaces/odbc/columninfo.c

@@ -16,7 +16,6 @@
 #include "connection.h"
 #include "socket.h"
 #include <stdlib.h>
-#include <malloc.h>
 #include <string.h>
 
 ColumnInfoClass *

src/interfaces/odbc/environ.c

@@ -17,7 +17,6 @@
 #include "connection.h"
 #include "statement.h"
 #include <stdlib.h>
-#include <malloc.h>
 #include <string.h>
 
 /* The one instance of the handles */

src/interfaces/odbc/tuplelist.c

@@ -13,7 +13,6 @@
  */
 
 #include <stdlib.h>
-#include <malloc.h>
 #include "tuplelist.h"
 #include "tuple.h"