Fix ecpg test program to properly access int* null indicator.

src/interfaces/ecpg/test/test3.pgc

@@ -68,7 +68,7 @@ exec sql end declare section;
 			printf(", born %ld", personal.birth.born);
 		if (ind_personal.ind_birth.age >= 0)
 			printf(", age = %d", personal.birth.age);
-		if (ind_married >= 0)
+		if (*ind_married >= 0)
 			printf(", married %10.10s", married->arr);
 		if (ind_children >= 0)
 			printf(", children = %d", children);
@@ -98,7 +98,7 @@ exec sql end declare section;
 			printf(", born %ld", personal.birth.born);
 		if (ind_personal.ind_birth.age >= 0)
 			printf(", age = %d", personal.birth.age);
-		if (ind_married >= 0)
+		if (*ind_married >= 0)
 			printf(", married %10.10s", married->arr);
 		if (ind_children >= 0)
 			printf(", children = %d", children);

src/interfaces/ecpg/test/test4.pgc

@@ -1,5 +1,6 @@
 #include <locale.h>
 #include <string.h>
+#include <stdlib.h>
 
 exec sql whenever sqlerror sqlprint;