Fix some variable names that are generated via m4 macros.

Sorry for committing configure changes during the day, but this is
necessary for some testing via multiple people at different sites.

This commit was SVN r9926.

config/f90_check.m4

@@ -165,8 +165,8 @@ AC_DEFUN([OMPI_F90_CHECK], [
     # Save some in shell variables for later use.  Have to use m4
     # functions here (vs. $ompi_upper_var_name, defined above) because
     # these need to be set at autoconf time, not configure time.
-    [OMPI_SIZEOF_F90_]m4_translit(m4_bpatsubst([$1], [^\([a-zA-Z_]*\).+], [[\1]]), [A-Z], [a-z])[=$ofc_type_size]
-    AC_SUBST([OMPI_SIZEOF_F90_]m4_translit(m4_bpatsubst([$1], [^\([a-zA-Z_]*\).+], [[\1]]), [A-Z], [a-z]))
+    [OMPI_SIZEOF_F90_]m4_translit(m4_bpatsubst(m4_bpatsubst([$1], [*], []), [[^a-zA-Z0-9_]], [_]), [a-z], [A-Z])[=$ofc_type_size]
+    AC_SUBST([OMPI_SIZEOF_F90_]m4_translit(m4_bpatsubst(m4_bpatsubst([$1], [*], []), [[^a-zA-Z0-9_]], [_]), [a-z], [A-Z]))
 
     # Clean up
     unset ofc_fortran_type ofc_expected_size ofc_want_range ofc_pretty_name