Add CRC field to struct ts_section_header and calculate it in common code

tsdata.h

 
 	int			data_len;						// Data size without the CRC32 (4 bytes)
 	uint8_t		*data;							// Offset into section_data (where the section data start without the section header)
+
+	uint32_t	CRC;
 };
 
 struct ts_pat_program {

tsfuncs_section_data.c

 	sec->section_pos += to_copy;
 	sec->num_packets++;
 	sec->initialized = (sec->section_pos+1) >= (sec->section_length + 4); // +4 to include the CRC
+	if (sec->initialized) {
+		// CRC is after sec->data[sec->data_len]
+		sec->CRC = (sec->CRC << 8) | sec->data[sec->data_len + 3];
+		sec->CRC = (sec->CRC << 8) | sec->data[sec->data_len + 2];
+		sec->CRC = (sec->CRC << 8) | sec->data[sec->data_len + 1];
+		sec->CRC = (sec->CRC << 8) | sec->data[sec->data_len + 0];
+	}
 }

tsfuncs_sections.c

 				t->current_next_indicator,
 				t->section_number,
 				t->last_section_number);
+		ts_LOGf("    - CRC 0x%08x\n", t->CRC);
 	}
 	ts_LOGf("    - Private vars       : num_packets:%d section_pos:%d\n",
 			t->num_packets,