remove doubled prototype

fix documentation about __TINYC__
define __STDC_HOSTED__ like __STDC__

TODO

@@ -9,7 +9,6 @@ Bugs:
 - constructors
 - cast bug (Peter Wang)
 - define incomplete type if defined several times (Peter Wang).
-- configure --cc=tcc (still one bug in libtcc1.c)
 - test binutils/gcc compile
 - tci patch + argument.
 - see -lxxx bug (Michael Charity).

libtcc.c

@@ -571,7 +571,8 @@ static void error1(TCCState *s1, int is_warning, const char *fmt, va_list ap)
     
     buf[0] = '\0';
     /* use upper file if inline ":asm:" or token ":paste:" */
-    for (f = file; f && f->filename[0] == ':'; f = f->prev);
+    for (f = file; f && f->filename[0] == ':'; f = f->prev)
+     ;
     if (f) {
         for(pf = s1->include_stack; pf < s1->include_stack_ptr; pf++)
             strcat_printf(buf, sizeof(buf), "In file included from %s:%d:\n",
@@ -924,7 +925,7 @@ LIBTCCAPI TCCState *tcc_new(void)
     /* standard defines */
     tcc_define_symbol(s, "__STDC__", NULL);
     tcc_define_symbol(s, "__STDC_VERSION__", "199901L");
-    tcc_define_symbol(s, "__STDC_HOSTED__", "1");
+    tcc_define_symbol(s, "__STDC_HOSTED__", NULL);
 
     /* target defines */
 #if defined(TCC_TARGET_I386)

tcc-doc.texi

@@ -597,8 +597,7 @@ are supported.
 
 @itemize
 
-@item @code{__TINYC__} is a predefined macro to @code{1} to
+@item @code{__TINYC__} is a predefined macro to indicate that you use TCC.
-indicate that you use TCC.
 
 @item @code{#!} at the start of a line is ignored to allow scripting.
 

tccpp.c

@@ -78,7 +78,6 @@ struct macro_level {
     const int *p;
 };
 
-ST_FUNC void next_nomacro(void);
 static void next_nomacro_spc(void);
 static void macro_subst(
     TokenString *tok_str,