makegpr.adb (Check_Compilation_Needed): Normalize C_Source_Path so that the source path name is always found in the...

2007-12-19  Vincent Celier  <celier@adacore.com>

	* makegpr.adb (Check_Compilation_Needed): Normalize C_Source_Path so
	that the source path name is always found in the dependencies.

From-SVN: r131085