Removed type 'varint_t'

size_t should be big enough to count the number of strings in a dump.
(And, by definition, it is big enough to count the length of each
string.)

ldump.c

@@ -30,7 +30,7 @@ typedef struct {
   int strip;
   int status;
   Table *h;  /* table to track saved strings */
-  lua_Unsigned nstr;  /* counter to number saved strings */
+  lua_Integer nstr;  /* counter for counting saved strings */
 } DumpState;
 
 
@@ -86,12 +86,12 @@ static void dumpByte (DumpState *D, int y) {
 ** size for 'dumpVarint' buffer: each byte can store up to 7 bits.
 ** (The "+6" rounds up the division.)
 */
-#define DIBS    ((sizeof(varint_t) * CHAR_BIT + 6) / 7)
+#define DIBS    ((sizeof(size_t) * CHAR_BIT + 6) / 7)
 
 /*
 ** Dumps an unsigned integer using the MSB Varint encoding
 */
-static void dumpVarint (DumpState *D, varint_t x) {
+static void dumpVarint (DumpState *D, size_t x) {
   lu_byte buff[DIBS];
   int n = 1;
   buff[DIBS - 1] = x & 0x7f;  /* fill least-significant byte */
@@ -101,9 +101,13 @@ static void dumpVarint (DumpState *D, varint_t x) {
 }
 
 
+static void dumpSize (DumpState *D, size_t sz) {
+  dumpVarint(D, sz);
+}
+
 static void dumpInt (DumpState *D, int x) {
   lua_assert(x >= 0);
-  dumpVarint(D, x);
+  dumpVarint(D, cast(size_t, x));
 }
 
 
@@ -126,22 +130,22 @@ static void dumpInteger (DumpState *D, lua_Integer x) {
 */
 static void dumpString (DumpState *D, TString *ts) {
   if (ts == NULL)
-    dumpVarint(D, 0);
+    dumpSize(D, 0);
   else {
     TValue idx;
     if (luaH_getstr(D->h, ts, &idx) == HOK) {  /* string already saved? */
-      dumpVarint(D, 1);  /* reuse a saved string */
-      dumpVarint(D, l_castS2U(ivalue(&idx)));  /* index of saved string */
+      dumpSize(D, 1);  /* reuse a saved string */
+      dumpSize(D, cast_sizet(ivalue(&idx)));  /* index of saved string */
     }
     else {  /* must write and save the string */
       TValue key, value;  /* to save the string in the hash */
       size_t size;
       const char *s = getlstr(ts, size);
-      dumpVarint(D, size + 2);
+      dumpSize(D, size + 2);
       dumpVector(D, s, size + 1);  /* include ending '\0' */
       D->nstr++;  /* one more saved string */
       setsvalue(D->L, &key, ts);  /* the string is the key */
-      setivalue(&value, l_castU2S(D->nstr));  /* its index is the value */
+      setivalue(&value, D->nstr);  /* its index is the value */
       luaH_set(D->L, D->h, &key, &value);  /* h[ts] = nstr */
       /* integer value does not need barrier */
     }