src: add a xspan check to p_tmt.cpp and clang-format

src/Makefile

@@ -79,7 +79,7 @@ CLANG_FORMAT_FILES += except.cpp except.h
 CLANG_FORMAT_FILES += file.cpp file.h
 CLANG_FORMAT_FILES += linker.cpp linker.h packhead.cpp packmast.cpp packmast.h
 CLANG_FORMAT_FILES += main.cpp options.cpp options.h packer.cpp packer.h
-CLANG_FORMAT_FILES += p_tos.cpp p_tos.h
+CLANG_FORMAT_FILES += p_tmt.cpp p_tmt.h p_tos.cpp p_tos.h
 CLANG_FORMAT_FILES += s_djgpp2.cpp s_object.cpp s_vcsa.cpp s_win32.cpp screen.h
 CLANG_FORMAT_FILES += ui.cpp ui.h work.cpp
 CLANG_FORMAT_FILES += $(wildcard util/[a-ln-z]*.[ch]* util/mem*.[ch]*)