Fix GCC warnings when comparing a char to EOF

src/parse_abc.c

@@ -278,7 +278,7 @@ static int parse_integer (int64_t *integer_p)
 static int parse_string_character (char *c_p)
 {
 	if (last_char!='\\'){
-		if (last_char==EOF)
+		if (last_char=='\0')
 			return 0;
 		*c_p=last_char;
 		last_char=next_character();
@@ -308,7 +308,7 @@ static int parse_string_character (char *c_p)
 				case 'r':	*c_p='\r';	break;
 #endif
 				case 't':	*c_p='\t';	break;
-				case EOF:	return 0;
+				case '\0':	return 0;
 				default:	*c_p=last_char;
 			}
 			last_char=next_character();
@@ -365,7 +365,7 @@ static int parse_descriptor_string (char *string,int *string_length_p)
 	while (last_char!='"'){
 		char c;
 
-		if (last_char==EOF)
+		if (last_char=='\0')
 			abc_parser_error_i ("Error in string at line %d\n",line_number);
 
 		c=last_char;

tools/interpretergen-c/specialized.icl

@@ -159,7 +159,7 @@ instr_endF t = foldl (flip append) t
 	, "\tIO_error(\"FEnd: not allowed for StdIO and StdErr\");"
 	, "else"
 	, "\th=f->file_handle;"
-	, "char c=getc(h);"
+	, "int c=getc(h);"
 	, "if (c==EOF) {"
 	, "\t*--bsp=1;"
 	, "} else {"