Fix missing ssa_op

I don't remember when these are missing :) I'll check later.

Author: iluuu1994

ext/opcache/jit/zend_jit_ir.c

@@ -14591,8 +14591,12 @@ static int zend_jit_fetch_obj(zend_jit_ctx         *jit,
 			if (on_this) {
 				op1_info &= ~MAY_BE_RC1;
 			}
-			if (ssa_op->op1_def >= 0) {
-				op1_info |= (ssa->var_info[ssa_op->op1_def].type & (MAY_BE_RC1|MAY_BE_RCN));
+			if (op1_info & (MAY_BE_RC1|MAY_BE_RCN)) {
+				if (!ssa_op) {
+					op1_info |= (MAY_BE_RC1|MAY_BE_RCN);
+				} else if (ssa_op->op1_def >= 0) {
+					op1_info |= (ssa->var_info[ssa_op->op1_def].type & (MAY_BE_RC1|MAY_BE_RCN));
+				}
 			}
 			jit_FREE_OP(jit, opline->op1_type, opline->op1, op1_info, opline);
 		}