Improve portability by integral division

This is a continuation after the commit 755f31e ("3.12.0")
which removed the dependency to the float log.

Once we find quartile values in TLSH, we perform a float division to
get q1/q3 and q2/q3 in percentage (and taken the mod 16) but lacks
portability (and has a bug which the committer explains later).

If we have a 32-bit divider, a 64-bit / 32-bit division is not that a
big cost (it's theoretically one instruction in x86 because the DIV
instruction performs a 64-bit / 32-bit division).

It also fixes the problem of arithmetic overflow calculating
unsigned 32-bit (q1*100) and (q2*100) (if they overflow, the ratio
will be an unexpected value).

Author: a4lg

src/tlsh_impl.cpp

@@ -784,8 +784,8 @@ void TlshImpl::final(int fc_cons_option)
     }
 
     this->lsh_bin.Lvalue = l_capturing(this->data_len);
-    this->lsh_bin.Q.QR.Q1ratio = (unsigned int) ((float)(q1*100)/(float) q3) % 16;
-    this->lsh_bin.Q.QR.Q2ratio = (unsigned int) ((float)(q2*100)/(float) q3) % 16;
+    this->lsh_bin.Q.QR.Q1ratio = (unsigned int) ((unsigned long long) q1 * 100 / q3) % 16;
+    this->lsh_bin.Q.QR.Q2ratio = (unsigned int) ((unsigned long long) q2 * 100 / q3) % 16;
     this->lsh_code_valid = true;   
 }