Add missing cstdint since gcc 13 is more picky.

src/dvparser.h

@@ -23,7 +23,7 @@
 
 #include<map>
 #include<set>
-#include<stdint.h>
+#include<cstdint>
 #include<time.h>
 #include<functional>
 #include<vector>

src/translatebits.h

@@ -18,7 +18,7 @@
 #ifndef TRANSLATEBITS_H
 #define TRANSLATEBITS_H
 
-#include<stdint.h>
+#include<cstdint>
 #include<string>
 #include<vector>
 

src/units.h

@@ -20,6 +20,7 @@
 
 #include<string>
 #include<vector>
+#include<cstdint>
 
 // A named quantity has a preferred unit,
 // ie Volume has m3 (cubic meters) Energy has kwh, Power has kw.

src/util.h

@@ -19,7 +19,7 @@
 #define UTIL_H
 
 #include<signal.h>
-#include<stdint.h>
+#include<cstdint>
 #include<string>
 #include<functional>
 #include<map>