Fix typo in type of srcpos_verror() et al.

The srcpos_verror() and srcpos_error() functions declare the format
string as 'char const *' instead of 'const char *'.  Fix it.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>

srcpos.c

@@ -291,7 +291,7 @@ srcpos_string(struct srcpos *pos)
 }
 
 void
-srcpos_verror(struct srcpos *pos, char const *fmt, va_list va)
+srcpos_verror(struct srcpos *pos, const char *fmt, va_list va)
 {
        const char *srcstr;
 
@@ -303,7 +303,7 @@ srcpos_verror(struct srcpos *pos, char const *fmt, va_list va)
 }
 
 void
-srcpos_error(struct srcpos *pos, char const *fmt, ...)
+srcpos_error(struct srcpos *pos, const char *fmt, ...)
 {
 	va_list va;
 

srcpos.h

@@ -107,9 +107,9 @@ extern struct srcpos *srcpos_copy(struct srcpos *pos);
 extern char *srcpos_string(struct srcpos *pos);
 extern void srcpos_dump(struct srcpos *pos);
 
-extern void srcpos_verror(struct srcpos *pos, char const *, va_list va)
+extern void srcpos_verror(struct srcpos *pos, const char *, va_list va)
      __attribute__((format(printf, 2, 0)));
-extern void srcpos_error(struct srcpos *pos, char const *, ...)
+extern void srcpos_error(struct srcpos *pos, const char *, ...)
      __attribute__((format(printf, 2, 3)));
 
 extern void srcpos_set_line(char *f, int l);