Fixed bug #748310 (pointer to function type mishandled when the

Fixed bug #748310 (pointer to function type mishandled when the
function name is omitted). Also fixed a SIGSEGV when a function
attribute (reentrant, etc) is used on a non-function or on a
function but misplaced before the parameter list.

* src/SDCC.y (abstract_declarator, abstract_declaractor2): fixed
bug #748310
* src/SDCC.y (declarator2_function_attributes): avoided SIGSEGV
* support/Util/SDCCerr.h,
* support/Util/SDCCerr.c: Added func attr misuse error msg

git-svn-id: https://sdcc.svn.sourceforge.net/svnroot/sdcc/trunk/sdcc@2829 4a8a32a2-be11-0410-ad9d-d568d2c75423