Fix memory allocations in pkcs7_verify test

Signed-off-by: Przemek Stekiel <przemyslaw.stekiel@mobica.com>
diff --git a/tests/suites/test_suite_pkcs7.function b/tests/suites/test_suite_pkcs7.function
index 016714b..3c93d0f 100644
--- a/tests/suites/test_suite_pkcs7.function
+++ b/tests/suites/test_suite_pkcs7.function
@@ -84,8 +84,8 @@
         }
     }
 
-    ASSERT_ALLOC(crts, sizeof(*crts)*n_crts);
-    ASSERT_ALLOC(crt_files_arr, sizeof(*crt_files_arr)*n_crts);
+    ASSERT_ALLOC(crts, n_crts);
+    ASSERT_ALLOC(crt_files_arr, n_crts);
 
     for (i = 0; i < strlen(crt_files); i++) {
         for (k = i; k < strlen(crt_files); k++) {
@@ -101,7 +101,7 @@
 
     mbedtls_pkcs7_init(&pkcs7);
     for (i = 0; i < n_crts; i++) {
-        ASSERT_ALLOC(crts[i], sizeof(*crts[i]));
+        ASSERT_ALLOC(crts[i], 1);
         mbedtls_x509_crt_init(crts[i]);
     }