Spelling fixes

Spelling errors found using github.com/lucasdemarchi/codespell
A tool to fix common misspellings.
This tool is licensed under GNU General Public License, version 2.

Change-Id: I1070feb715b037adbb55badc516d8a63c0b721bc
Signed-off-by: Gunnar Mills <gmills@us.ibm.com>
diff --git a/image_verify.cpp b/image_verify.cpp
index e1e961d..388f489 100644
--- a/image_verify.cpp
+++ b/image_verify.cpp
@@ -222,7 +222,7 @@
     // Adds all digest algorithms to the internal table
     OpenSSL_add_all_digests();
 
-    // Create Hash structre.
+    // Create Hash structure.
     auto hashStruct = EVP_get_digestbyname(hashFunc.c_str());
     if (!hashStruct)
     {