#27176: Assigning a string to an year column has unexpected results
#26359: Strings becoming truncated and converted to numbers under STRICT mode

Problems: 
1. storing a string to an integer field we don't check 
   if strntoull10rnd() returns MY_ERRNO_EDOM error.
   Fix: check for MY_ERRNO_EDOM.
2. storing a string to an year field we use my_strntol() function.
   Fix: use strntoull10rnd() instead.