MIPS PATCH: correct the type of mips_explicit_type_size_string.

[Gavin Romig-Koch]

For those of you having trouble building the mips target this
morning - I've just committed the following.  Sorry for the 
inconvenience.

                                         -gavin...


       * config/mips/mips.c (mips_explicit_type_size_string): Correct
       its type.

Index: gcc/config/mips/mips.c
===================================================================
RCS file: /egcs/carton/cvsfiles/egcs/gcc/config/mips/mips.c,v
retrieving revision 1.54
diff -u -p -r1.54 mips.c
--- gcc/config/mips/mips.c	1999/03/16 08:03:57	1.54
+++ gcc/config/mips/mips.c	1999/03/18 13:24:00
@@ -224,7 +224,7 @@ const char *mips_no_mips16_string;
 /* This is only used to determine if an type size setting option was 
    explicitly specified (-mlong64, -mint64, -mlong32).  The specs
    set this option if such an option is used. */
-char *mips_explicit_type_size_string;
+const char *mips_explicit_type_size_string;
 
 /* Whether we are generating mips16 hard float code.  In mips16 mode
    we always set TARGET_SOFT_FLOAT; this variable is nonzero if