utils.c - Comment type fails compilation on AIX.

Changed // to /* as reported by hkpatv.  Resolves Issue #30.

plugins/utils.c

@@ -631,7 +631,7 @@ char *fperfdata (const char *label,
 	return data;
 }
 
-// set entire string to lower, no need to return as it works on string in place
+/* set entire string to lower, no need to return as it works on string in place */
 void strntolower (char * test_char, int size) {
 
         char * ptr = test_char;
@@ -641,7 +641,7 @@ void strntolower (char * test_char, int size) {
 
 }
 
-// set entire string to lower, no need to return as it works on string in place
+/* set entire string to lower, no need to return as it works on string in place */
 void strntoupper (char * test_char, int size) {
 
         char * ptr = test_char;