light: the source file failed on cppcheck

[yorkie]

The light currently are not friend to cppcheck, this needs to be refactored. The current error are:

ERROR= <error id="unreachableCode" severity="style" msg="Statements following return, break, continue, goto or throw will never be executed." verbose="Statements following return, break, continue, goto or throw will never be executed." cwe="561">
        <error id="unreachableCode" severity="style" msg="Statements following return, break, continue, goto or throw will never be executed." verbose="Statements following return, break, continue, goto or throw will never be executed." cwe="561">
        <error id="unreachableCode" severity="style" msg="Statements following return, break, continue, goto or throw will never be executed." verbose="Statements following return, break, continue, goto or throw will never be executed." cwe="561">
        <error id="variableScope" severity="style" msg="The scope of the variable &apos;pos&apos; can be reduced." verbose="The scope of the variable &apos;pos&apos; can be reduced. Warning: Be careful when fixing this message, especially when there are inner loops. Here is an example where cppcheck will write that the scope for &apos;i&apos; can be reduced:
void f(int x)
{
    int i = 0;
    if (x) {
        // it&apos;s safe to move &apos;int i = 0;&apos; here
        for (int n = 0; n &lt; 10; ++n) {
            // it is possible but not safe to move &apos;int i = 0;&apos; here
            do_something(&amp;i);
        }
    }
}
When you see this message it is always safe to reduce the variable scope 1 level." cwe="398">
        <error id="ConfigurationNotChecked" severity="information" msg="Skipping configuration &apos;MIC_ANGLE_DEVIATION&apos; since the value of &apos;MIC_ANGLE_DEVIATION&apos; is unknown. Use -D if you want to check it. You can use -U to skip it explicitly." verbose="Skipping configuration &apos;MIC_ANGLE_DEVIATION&apos; since the value of &apos;MIC_ANGLE_DEVIATION&apos; is unknown. Use -D if you want to check it. You can use -U to skip it explicitly."> 

/cc @LanFly @legendecas