Remove null-pointer checks that are not needed.

If a pointer is guaranteed to carry information there is no need to check
for NULL again. Patch by Michael Paquier.

src/interfaces/ecpg/ecpglib/data.c

@@ -575,7 +575,7 @@ ecpg_get_data(const PGresult *results, int act_tuple, int act_field, int lineno,
 					if (nres == NULL)
 					{
 						ecpg_log("ecpg_get_data on line %d: RESULT %s; errno %d\n",
-								 lineno, pval ? pval : "", errno);
+								 lineno, pval, errno);
 
 						if (INFORMIX_MODE(compat))
 						{
@@ -634,7 +634,7 @@ ecpg_get_data(const PGresult *results, int act_tuple, int act_field, int lineno,
 					if (ires == NULL)
 					{
 						ecpg_log("ecpg_get_data on line %d: RESULT %s; errno %d\n",
-								 lineno, pval ? pval : "", errno);
+								 lineno, pval, errno);
 
 						if (INFORMIX_MODE(compat))
 						{
@@ -688,7 +688,7 @@ ecpg_get_data(const PGresult *results, int act_tuple, int act_field, int lineno,
 					if (errno != 0)
 					{
 						ecpg_log("ecpg_get_data on line %d: RESULT %s; errno %d\n",
-								 lineno, pval ? pval : "", errno);
+								 lineno, pval, errno);
 
 						if (INFORMIX_MODE(compat))
 						{
@@ -736,7 +736,7 @@ ecpg_get_data(const PGresult *results, int act_tuple, int act_field, int lineno,
 					if (errno != 0)
 					{
 						ecpg_log("ecpg_get_data on line %d: RESULT %s; errno %d\n",
-								 lineno, pval ? pval : "", errno);
+								 lineno, pval, errno);
 
 						if (INFORMIX_MODE(compat))
 						{