Fix OOB write in --print-code.

test/mjsunit/regress/regress-2624.js

Index: test/mjsunit/regress/regress-2624.js
diff --git a/test/mjsunit/regress/regress-crbug-172345.js b/test/mjsunit/regress/regress-2624.js
similarity index 91%
copy from test/mjsunit/regress/regress-crbug-172345.js
copy to test/mjsunit/regress/regress-2624.js
index 711501caa791f2974635ac4dd894568a2e3fc982..2bfd7b2585016cda6db68fbac10d4a395e7ece09 100644
--- a/test/mjsunit/regress/regress-crbug-172345.js
+++ b/test/mjsunit/regress/regress-2624.js
@@ -25,10 +25,12 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-function f(a,i) {
-  return a[i];
+// Flags: --print-code
+
+var source = '"snowmen invasion " + "';
+for(var i = 0; i < 800; i++) {
+  source += '\u2603';
 }
+source += '"';
+eval(source);
 
-f([1,2,3], "length");
-f([1,2,3], "length");
-f([1,2,3], 2);