Refine use of integer variables to quiet static analyzers and reduce object code size a little

Note that the no bugs of consequence were found by the static analyzer. The analyzer used was codesafe.cn
diff --git a/src/ieee754.h b/src/ieee754.h
index d2c1224..705ef62 100644
--- a/src/ieee754.h
+++ b/src/ieee754.h
@@ -24,7 +24,7 @@
  +/- infinity, +/- zero, subnormal numbers, qNaN, sNaN and NaN
  payloads.
 
- This confirms to IEEE 754-2008, but note that this doesn't specify
+ This conforms to IEEE 754-2008, but note that this doesn't specify
  conversions, just the encodings.
 
  NaN payloads are preserved with alignment on the LSB. The qNaN bit is