Missing cstdint includes

[jose1711]

Archlinux, x86_64 is complaining about missing includes.

$ make
[ 10%] Building CXX object CMakeFiles/xmchord.dir/xmchord/helper/textual.cc.o
In file included from /home/jose/tmp/xmchord/xmchord/helper/textual.cc:30:
/home/jose/tmp/xmchord/xmchord/helper/textual.h:53:5: error: ‘uint32_t’ has not been declared
   53 |     uint32_t pos = 0);
      |     ^~~~~~~~
/home/jose/tmp/xmchord/xmchord/helper/textual.h:38:1: note: ‘uint32_t’ is defined in header ‘<cstdint>’; this is probably fixable by adding ‘#include <cstdint>’
   37 | #include <vector>
  +++ |+#include <cstdint>
   38 | 
/home/jose/tmp/xmchord/xmchord/helper/textual.cc:52:5: error: ‘uint32_t’ has not been declared
   52 |     uint32_t pos) {
      |     ^~~~~~~~
/home/jose/tmp/xmchord/xmchord/helper/textual.cc:31:1: note: ‘uint32_t’ is defined in header ‘<cstdint>’; this is probably fixable by adding ‘#include <cstdint>’
   30 | #include <xmchord/helper/textual.h>
  +++ |+#include <cstdint>
   31 | 

The binary is successfully compiled after patching the textual files.