Avoid possible memory leak.
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		@@ -325,10 +325,6 @@ STACK_OF(X509) *PKCS7_get0_signers(PKCS7 *p7, STACK_OF(X509) *certs, int flags)
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		PKCS7err(PKCS7_F_PKCS7_GET0_SIGNERS,PKCS7_R_WRONG_CONTENT_TYPE);
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		return NULL;
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	}
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	if(!(signers = sk_X509_new_null())) {
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		PKCS7err(PKCS7_F_PKCS7_GET0_SIGNERS,ERR_R_MALLOC_FAILURE);
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		return NULL;
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	}
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	/* Collect all the signers together */
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@@ -339,6 +335,11 @@ STACK_OF(X509) *PKCS7_get0_signers(PKCS7 *p7, STACK_OF(X509) *certs, int flags)
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		return 0;
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	}
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	if(!(signers = sk_X509_new_null())) {
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		PKCS7err(PKCS7_F_PKCS7_GET0_SIGNERS,ERR_R_MALLOC_FAILURE);
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		return NULL;
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	}
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	for (i = 0; i < sk_PKCS7_SIGNER_INFO_num(sinfos); i++)
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	{
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	    si = sk_PKCS7_SIGNER_INFO_value(sinfos, i);
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