Fixed a core dump with signed/unsigned and an error in converting from

subsystem text to subsystem number

This version compiles and runs under rhel7

logv2.c

@@ -221,7 +221,7 @@ int subsystemFromText(const char *text)
       return i;
     }
   }
-  return -1;
+  return SINVALID;
 } 
 /*----------------------------------------------------------------------------*/
 void formatSubsystem(unsigned int sub, char *buffer, unsigned int bufferLength)
@@ -265,7 +265,7 @@ unsigned int logFilter(unsigned int severity, const char *subsystem, const char
     If it is in the list of enabled subsystems, everything is logged
   */
   sub = subsystemFromText(subsystem);
-  if(sub >= 0 && severity <= logEnabledArray[sub]){
+  if((sub >= 0 && sub <= SINVALID) && severity <= logEnabledArray[sub]){
     return 0;
   }
 

logv2.h

@@ -38,7 +38,7 @@
 #define SHISTORY 7
 #define SINVALID 8
 
-#define MAXSUB 7
+#define MAXSUB 8
  
 
 /* write a log message