gfortran.h (try): Remove macro.

	* gfortran.h (try): Remove macro.  Replace try with gfc_try
	throughout.
	* array.c: Likewise.
	* check.c: Likewise.
	* cpp.c: Likewise.
	* cpp.h: Likewise.
	* data.c: Likewise.
	* data.h: Likewise.
	* decl.c: Likewise.
	* error.c: Likewise.
	* expr.c: Likewise.
	* interface.c: Likewise.
	* intrinsic.c: Likewise.
	* intrinsic.h: Likewise.
	* io.c: Likewise.
	* match.h: Likewise.
	* parse.c: Likewise.
	* parse.h: Likewise.
	* resolve.c: Likewise.
	* scanner.c: Likewise.
	* simplify.c: Likewise.
	* symbol.c: Likewise.
	* trans-openmp.c: Likewise.
	* trans-types.c: Likewise.

From-SVN: r138226