Merge _fixblobs() into _prepFields()

Following up on #767, per @Unifex's suggestion [1], removing _fixblobs()
and moving its code into new _prepFields() function.

Additional changes:
- add PHPDoc block
- protected attribute
- remove return type - not really useful as in most cases success is
  evaluated by checking $this->fields !== false
- fixed a couple remaining occurrences of is_array() checks
- coding guidelines

[1]: https://github.com/ADOdb/ADOdb/pull/760#issuecomment-961564909

1 files changed, 9 insertions, 3 deletions

diff --git a/drivers/adodb-postgres7.inc.php b/drivers/adodb-postgres7.inc.php
index 52b59f71..ddbe7a6e 100644
--- a/drivers/adodb-postgres7.inc.php
+++ b/drivers/adodb-postgres7.inc.php
@@ -300,7 +300,9 @@ class ADORecordSet_postgres7 extends ADORecordSet_postgres64{
 			$this->_currentRow++;
 			if ($this->_numOfRows < 0 || $this->_numOfRows > $this->_currentRow) {
 				$this->_prepfields();
-				if ($this->fields !== false) return true;
+				if ($this->fields !== false) {
+					return true;
+				}
 			}
 			$this->fields = false;
 			$this->EOF = true;
@@ -321,9 +323,13 @@ class ADORecordSet_assoc_postgres7 extends ADORecordSet_postgres64{
 			return false;
 		}
 
-		if ($this->_prepfields()) $this->_updatefields();
+		$this->_prepfields();
+		if ($this->fields !== false) {
+			$this->_updatefields();
+			return true;
+		}
 
-		return (is_array($this->fields));
+		return false;
 	}
 
 	function MoveNext()