re PR bootstrap/6445 (ICE bootstrapping objc for i386-rtems)

	PR bootstrap/6445
	* config/i386/i386.md (untyped_call): Return the value in a float
	register if TARGET_FLOAT_RETURNS_IN_80387, not just if
	TARGET_80387.

From-SVN: r52824

gcc/config/i386/i386.md

@@ -13686,7 +13686,7 @@
      simply pretend the untyped call returns a complex long double
      value.  */
 
-  emit_call_insn (TARGET_80387
+  emit_call_insn (TARGET_FLOAT_RETURNS_IN_80387
                   ? gen_call_value (gen_rtx_REG (XCmode, FIRST_FLOAT_REG),
 				    operands[0], const0_rtx,
 				    GEN_INT (SSE_REGPARM_MAX - 1))