Refactor the Vdbe.noIO field as Vdbe.bIsReader. The meaning is inverted.

FossilOrigin-Name: 59f98c5c241e5a61cd5b6d0e69b55a6b44c5cafc
diff --git a/src/sqliteInt.h b/src/sqliteInt.h
index 2c19b84..5193fac 100644
--- a/src/sqliteInt.h
+++ b/src/sqliteInt.h
@@ -897,10 +897,10 @@
     u8 busy;                    /* TRUE if currently initializing */
     u8 orphanTrigger;           /* Last statement is orphaned TEMP trigger */
   } init;
-  int nVdbeActive;            /* Number of VDBEs currently executing */
-  int nVdbeRead;              /* Number of active VDBEs that read or write */
-  int nVdbeWrite;             /* Number of active VDBEs that read and write */
-  int nVdbeExec;              /* Number of nested calls to VdbeExec() */
+  int nVdbeActive;              /* Number of VDBEs currently running */
+  int nVdbeRead;                /* Number of active VDBEs that read or write */
+  int nVdbeWrite;               /* Number of active VDBEs that read and write */
+  int nVdbeExec;                /* Number of nested calls to VdbeExec() */
   int nExtension;               /* Number of loaded extensions */
   void **aExtension;            /* Array of shared library handles */
   void (*xTrace)(void*,const char*);        /* Trace function */