[gcc r17-1441] pdp11-aout: Remove invalid conversion and restore build

[Martin Jambor]

https://gcc.gnu.org/g:e7fdcf4738f4e4699022e8ea72776cbc5989de8e

commit r17-1441-ge7fdcf4738f4e4699022e8ea72776cbc5989de8e
Author: Martin Jambor <mjambor@suse.cz>
Date:   Tue Jun 9 12:00:26 2026 +0200

    pdp11-aout: Remove invalid conversion and restore build
    
    When cross compiling to pdp11-aout, the build has been recently
    failing with
    
      error: invalid conversion from 'int*' to 'unsigned int*'
    
    This patch changes the variable in question to the appropriate type
    and fixes the issue (I have not looked at the code beyond that).
    
    Tested by successfully configuring gcc with
    
      ../src/configure --prefix=/home/mjambor/gcc/mine/inst --enable-languages=c,c++ --enable-checking=yes --disable-bootstrap --disable-multilib --enable-obsolete --target=pdp11-aout
    
    and running make all-host.
    
    gcc/ChangeLog:
    
    2026-06-09  Martin Jambor  <mjambor@suse.cz>
    
            * config/pdp11/pdp11.cc (pdp11_conditional_register_usage): Change i
            from int to unsigned int.

Diff:
---
 gcc/config/pdp11/pdp11.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gcc/config/pdp11/pdp11.cc b/gcc/config/pdp11/pdp11.cc
index 7aee804439d0..f8fe020b2467 100644
--- a/gcc/config/pdp11/pdp11.cc
+++ b/gcc/config/pdp11/pdp11.cc
@@ -2209,7 +2209,7 @@ pdp11_function_arg_advance (cumulative_args_t cum_v,
 static void
 pdp11_conditional_register_usage (void)
 {
-  int i;
+  unsigned int i;
   HARD_REG_SET x;
   if (!TARGET_FPU)
     {