libluna: Fix comparison of StringViews without null termination

This regressed in de7e58c274, and made value arguments pretty much unusable.

This really needs a test...

libluna/src/CString.cpp

@@ -81,7 +81,8 @@ extern "C"
             a++;
             b++;
         }
-        return *(const u8*)a - *(const u8*)b;
+        static_assert(sizeof(wchar_t) == sizeof(u32));
+        return *(const u32*)a - *(const u32*)b;
     }
 
     int strncmp(const char* a, const char* b, usize max)

libluna/src/StringView.cpp

@@ -50,12 +50,14 @@ const char& StringView::operator[](usize index) const
 
 bool StringView::operator==(const char* other) const
 {
-    return !strcmp(m_string, other);
+    if (m_length != strlen(other)) return false;
+    return !strncmp(m_string, other, m_length);
 }
 
 bool StringView::operator==(StringView other) const
 {
-    return !strcmp(m_string, other.m_string);
+    if (m_length != other.m_length) return false;
+    return !strncmp(m_string, other.m_string, m_length);
 }
 
 Result<Vector<String>> StringView::split(StringView delim) const