Removed goto's in 'luaD_precall'

(plus a detail in lauxlib.h.)

lauxlib.h

@@ -102,7 +102,7 @@ LUALIB_API lua_State *(luaL_newstate) (void);
 
 LUALIB_API lua_Integer (luaL_len) (lua_State *L, int idx);
 
-LUALIB_API void luaL_addgsub (luaL_Buffer *b, const char *s,
+LUALIB_API void (luaL_addgsub) (luaL_Buffer *b, const char *s,
                                      const char *p, const char *r);
 LUALIB_API const char *(luaL_gsub) (lua_State *L, const char *s,
                                     const char *p, const char *r);

ldo.c

@@ -511,23 +511,10 @@ l_sinline CallInfo *prepCallInfo (lua_State *L, StkId func, int nret,
 
 
 /*
-** Prepares the call to a function (C or Lua). For C functions, also do
-** the call. The function to be called is at '*func'.  The arguments
-** are on the stack, right after the function.  Returns the CallInfo
-** to be executed, if it was a Lua function. Otherwise (a C function)
-** returns NULL, with all the results on the stack, starting at the
-** original function position.
+** precall for C functions
 */
-CallInfo *luaD_precall (lua_State *L, StkId func, int nresults) {
-  lua_CFunction f;
- retry:
-  switch (ttypetag(s2v(func))) {
-    case LUA_VCCL:  /* C closure */
-      f = clCvalue(s2v(func))->f;
-      goto Cfunc;
-    case LUA_VLCF:  /* light C function */
-      f = fvalue(s2v(func));
-     Cfunc: {
+l_sinline CallInfo *precallC (lua_State *L, StkId func, int nresults,
+                                            lua_CFunction f) {
   int n;  /* number of returns */
   CallInfo *ci;
   checkstackGCp(L, LUA_MINSTACK, func);  /* ensure minimum stack size */
@@ -545,6 +532,22 @@ CallInfo *luaD_precall (lua_State *L, StkId func, int nresults) {
   luaD_poscall(L, ci, n);
   return NULL;
 }
+
+
+/*
+** Prepares the call to a function (C or Lua). For C functions, also do
+** the call. The function to be called is at '*func'.  The arguments
+** are on the stack, right after the function.  Returns the CallInfo
+** to be executed, if it was a Lua function. Otherwise (a C function)
+** returns NULL, with all the results on the stack, starting at the
+** original function position.
+*/
+CallInfo *luaD_precall (lua_State *L, StkId func, int nresults) {
+  switch (ttypetag(s2v(func))) {
+    case LUA_VCCL:  /* C closure */
+      return precallC(L, func, nresults, clCvalue(s2v(func))->f);
+    case LUA_VLCF:  /* light C function */
+      return precallC(L, func, nresults, fvalue(s2v(func)));
     case LUA_VLCL: {  /* Lua function */
       CallInfo *ci;
       Proto *p = clLvalue(s2v(func))->p;
@@ -561,7 +564,7 @@ CallInfo *luaD_precall (lua_State *L, StkId func, int nresults) {
     }
     default: {  /* not a function */
       func = luaD_tryfuncTM(L, func);  /* try to get '__call' metamethod */
-      goto retry;  /* try again with metamethod */
+      return luaD_precall(L, func, nresults); /* try again with metamethod */
     }
   }
 }