C API : Fixed segfault in OCI_PoolFree() introduced in v4.0.0 code refactoring
C API : Fixed segfault in OCI_PoolFree() introduced in v4.0.0 code refactoring

alexeyvo/ocilib,ljx0305/ocilib,kornefalk/ocilib2017,vrogier/ocilib,alexeyvo/ocilib,Convey-Compliance/ocilib,lawrence200801/ocilib,kornefalk/ocilib2017,vrogier/ocilib,alexeyvo/ocilib,Convey-Compliance/ocilib,vrogier/ocilib,lawrence200801/ocilib,lawrence200801/ocilib,kornefalk/ocilib2017,Convey-Compliance/ocilib,ljx0305/ocilib,ljx0305/ocilib,vrogier/ocilib