SQL_FLOAT handler casts from float to internal double which causes precision issues.

[mlazdans]

Code in question:

php-firebird/ibase_query.c

Lines 1320 to 1322 in 23aca98

	case SQL_FLOAT:
	ZVAL_DOUBLE(val, *(float *) data);
	break;

Test case:

CREATE TABLE FLOAT_TEST (
    FLOAT_FIELD FLOAT DEFAULT 3.14
);

ibase_query("INSERT INTO FLOAT_TEST (FLOAT_FIELD) VALUES (1.23)") or die ("ibase_query failed");
$q = ibase_query("SELECT * FROM FLOAT_TEST") or die ("ibase_query failed");
$r = ibase_fetch_object($q) or die ("ibase_fetch_object failed");
var_dump($r);

object(stdClass)#1 (1) {
  ["FLOAT_FIELD"]=>
  float(1.2300000190734863)
}

Should be: 1.23