RFR: 8036675 Compiler warnings in serviceability code

[Staffan Larsen]

This change addresses two compiler warnings in serviceability code.


/home/staffan/mercurial/jdk9-dev/jdk/src/share/native/sun/tracing/dtrace/JVM.c:292:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] 
         if (len >= sizeof(buf)) { 

In this case I added a cast from size_t to jsize.


/home/staffan/mercurial/jdk9-dev/jdk/src/share/demo/jvmti/hprof/hprof_init.c:244:5: warning: comparison is always false due to limited range of data type [-Wtype-limits] 
     if (port == 0 || port > 65535) {

In this case I keep the port number as an int until after the validation is done.


Thanks,
/Staffan 


bug: https://bugs.openjdk.java.net/browse/JDK-8036675
webrev: http://cr.openjdk.java.net/~sla/8036675/webrev.00/