General code cleanups

* Use default member initializers
* Use range-based loops
* Don't use 'else' after 'return'
* Removed some unused includes
* Construct empty strings with std::string() instead of ""
* Clear strings with .clear() instead of assigning ""
* Check whether strings are empty with .empty() instead of comparing to ""
* Removed redundant initializations

1 files changed, 1 insertions, 1 deletions

diff --git a/src/utils/sha256.cpp b/src/utils/sha256.cpp
index a18e5f18..0e44af7a 100644
--- a/src/utils/sha256.cpp
+++ b/src/utils/sha256.cpp
@@ -264,7 +264,7 @@ std::string SHA256Hash(const char *src, int len)
     SHA256Final(&ctx, bytehash);
     // Convert it to hex
     const char* hxc = "0123456789abcdef";
-    std::string hash = "";
+    std::string hash;
     for (unsigned char i : bytehash)
     {
         hash += hxc[i / 16];