Fixed defects

List of Defects

Error: COMPILER_WARNING (CWE-569): [#def1]
kio-extras-24.02.1-build/kio-extras-24.02.1/sftp/kio_sftp.cpp: scope_hint: In function ‘std::optional<std::filesystem::perms> {anonymous}::posixToOptionalPerms(uint32_t)’
kio-extras-24.02.1-build/kio-extras-24.02.1/sftp/kio_sftp.cpp:194:14: warning[-Wtype-limits]: comparison of unsigned expression in ‘< 0’ is always false
#  194 |     if (mode < 0) {
#      |         ~~~~~^~~
#  192|   inline std::optional<perms> posixToOptionalPerms(uint32_t mode) noexcept
#  193|   {
#  194|->     if (mode < 0) {
#  195|           return {};
#  196|       }

Error: COMPILER_WARNING (CWE-252): [#def2]
kio-extras-24.02.1-build/kio-extras-24.02.1/thumbnail/thumbnail.cpp: scope_hint: In function ‘int kdemain(int, char**)’
kio-extras-24.02.1-build/kio-extras-24.02.1/thumbnail/thumbnail.cpp:94:9: warning[-Wunused-result]: ignoring return value of ‘int nice(int)’ declared with attribute ‘warn_unused_result’
#   94 |     nice(5);
#      |     ~~~~^~~
#   92|       SetPriorityClass(GetCurrentProcess(), BELOW_NORMAL_PRIORITY_CLASS);
#   93|   #else
#   94|->     nice(5);
#   95|   #endif
#   96|   

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