Resolves: #i125447# corrected some string to number conversion...

tools to correct svg:d imports

(cherry picked from commit f077f99da3cb2903fa903dcf30e6cfd714fd009c)

Conflicts:
	basegfx/source/inc/stringconversiontools.hxx
	basegfx/source/tools/stringconversiontools.cxx

Change-Id: I7de1558682990f83e66fdded3d9d30e21e4f97fe