Adds static to helper functions

Author: MichealReed

numeric_types/half.h

@@ -8,8 +8,8 @@
 #include <cstdio>
 
 struct half;
-half halfFromFloat(float f);
-float halfToFloat(half h);
+static half halfFromFloat(float f);
+static float halfToFloat(half h);
 
 /**
  * Experimental implementation of half-precision 16-bit floating point numbers.

utils/logging.h

@@ -67,7 +67,7 @@ static Logger kDefLog = {stdout, "", kInfo};
  * @brief Set the log level of the default logger.
  * @param level The log level to set.
  */
-void setLogLevel(int level) {
+static void setLogLevel(int level) {
   kDefLog.level = level;
 }