libluna: Fix String::from_string_view construction for inline strings

Before, this method failed to add a null terminator if the source string did not have one, which was possible.

libluna/src/CString.cpp

@@ -51,7 +51,7 @@ extern "C"
     {
         if (dest == src) return dest;
         if (dest > src)
-            for (long i = (long)n - 1; i >= 0; i++) { *((u8*)dest + i) = *((const u8*)src + i); }
+            for (long i = (long)n - 1; i >= 0; i--) { *((u8*)dest + i) = *((const u8*)src + i); }
         else
             for (long i = 0; i < (long)n; i++) { *((u8*)dest + i) = *((const u8*)src + i); }
         return dest;

libluna/src/String.cpp

@@ -155,7 +155,8 @@ Result<String> String::from_string_view(StringView str)
         String result;
         result.m_inline = true;
         result.m_length = str.length();
-        strncpy(result.m_inline_storage, str.chars(), sizeof(m_inline_storage));
+        memset(result.m_inline_storage, 0, sizeof(result.m_inline_storage));
+        memcpy(result.m_inline_storage, str.chars(), str.length());
         return result;
     }