slprintf() leak ?

==6700== 36 bytes in 1 blocks are still reachable in loss record 14 of 39
==6700==    at 0x4C28C20: malloc (vg_replace_malloc.c:296)
==6700==    by 0x9FC2DE: Balloc (zend_strtod.c:600)
==6700==    by 0x9FC7EC: mult (zend_strtod.c:879)
==6700==    by 0x9FCA7F: pow5mult (zend_strtod.c:1007)
==6700==    by 0xA00836: zend_dtoa (zend_strtod.c:4178)
==6700==    by 0x942CD1: __cvt (snprintf.c:96)
==6700==    by 0x942E66: php_fcvt (snprintf.c:138)
==6700==    by 0x943389: php_conv_fp (snprintf.c:389)
==6700==    by 0x944DD3: format_converter (snprintf.c:1036)
==6700==    by 0x9454E6: strx_printv (snprintf.c:1248)
==6700==    by 0x9455CA: ap_php_slprintf (snprintf.c:1264)