as10k1 - increase max number of macros and check the size

- Increase the max number of macros to 30.
- Check the current number of macros to avoid segfault.

as10k1/macro.c

@@ -46,6 +46,10 @@ void new_macro(char *symbol, char *line, char *operand)
 {
         extern int source_line_num;
         struct sym *sym;
+
+	if (macro_ctn >= MAX_DEF_MACRO)
+                as_exit("Parse Error: Too many macros");
+
         if(isalpha(*symbol)==0)
                 as_exit("Parse Error: Symbol must start with an alpha character");
         

as10k1/types.h

@@ -108,7 +108,7 @@ struct macrdef{
 #define NO_SYM "__NO_NAME"
 
 
-#define MAX_DEF_MACRO 25
+#define MAX_DEF_MACRO 30
 #define MAX_MAC_DEPTH 5