EAP: Fix some undefined behaviors at runtime

EAP: Fix some undefined behaviors at runtime

The errors were like:
print-eap.c:179:25: runtime error: unsigned integer overflow:
  2 - 5 cannot be represented in type 'unsigned int'
print-eap.c:181:50: runtime error: unsigned integer overflow:
  2 - 5 cannot be represented in type 'unsigned int'
print-eap.c:186:25: runtime error: unsigned integer overflow:
  2 - 5 cannot be represented in type 'unsigned int'
print-eap.c:188:50: runtime error: unsigned integer overflow:
  2 - 5 cannot be represented in type 'unsigned int'