bsd/darwin-user: mmap_frag() users only check for -1 error

See also ee636500d6.

Signed-off-by: Blue Swirl <blauwirbel@gmail.com>

bsd-user/mmap.c

@@ -240,7 +240,7 @@ static int mmap_frag(abi_ulong real_start,
            possible while it is a shared mapping */
         if ((flags & TARGET_BSD_MAP_FLAGMASK) == MAP_SHARED &&
             (prot & PROT_WRITE))
-            return -EINVAL;
+            return -1;
 
         /* adjust protection to be able to read */
         if (!(prot1 & PROT_WRITE))

darwin-user/mmap.c

@@ -129,7 +129,7 @@ int mmap_frag(unsigned long host_start,
         if ((flags &  MAP_SHARED) &&
 #endif
             (prot & PROT_WRITE))
-            return -EINVAL;
+            return -1;
 
         /* adjust protection to be able to read */
         if (!(prot1 & PROT_WRITE))