Detects statements with possible loss of decimal places

Justification: A piece of code of the following type (‎diTemp2 := 1 rTemp1 := TO_REAL(diTemp2 / DINT#2)‎) can cause a misinterpretation. The author or reader of this line of code can assume that the division would be performed as a ‎REAL‎ operation, and in this case the result would be ‎REAL#0.5‎. However, this is not true. It is an integer operation. The result is cast to ‎REAL‎ and ‎rTemp1‎ gets the value ‎REAL#0‎. To avoid this, use a cast to make sure that the operation is performed as a ‎REAL‎ operation: ‎rTemp1 := TO_REAL(diTemp2) / REAL#2‎.

Importance: Medium

PROGRAM PLC_PRG
VAR
	rTemp1 : REAL;
	diTemp2 : DINT;
	liTemp3 : LINT;  
END_VAR

diTemp2 := diTemp2 + DINT#11;
rTemp1 := DINT_TO_REAL(diTemp2 / DINT#3);    // SA0057
rTemp1 := DINT_TO_REAL(diTemp2) / REAL#3.0;
liTemp3 := liTemp3 + LINT#13;
rTemp1 := LINT_TO_REAL(liTemp3 / LINT#7);    // SA0057
rTemp1 := LINT_TO_REAL(liTemp3) / REAL#7.0;


--> SA0057: Possible loss of decimal places