PEAR_PackageUpdate::hasErrors -- 
   Returns whether or not errors have occurred (and been captured).
  
Description
   Returns whether or not errors , and or, warnings (version 0.7.0 or better)
   have occurred.
  
Parameter
   
- mixed $level
 
       The level of errors to pop off of the stack (warning|error). Use FALSE
       if you want all errors and warnings at once.
      
 
  Note
   since 0.4.0a1
  
This function can not be called
statically.
Return value
   boolean - TRUE if errors(/warnings) have been captured, FALSE othewise.