Fix compile error with arrays of packed strings

This fixes the "possibly non-terminated string" error when declaring an
array of packed strings (unpacked strings worked OK).

Test code:

new x[][] = {
	!"hello",
	!"world"
};

main() {
	printf("%s", x[0]);
}

source/compiler/sc2.c

@@ -1868,7 +1868,7 @@ static const unsigned char *packedstring(const unsigned char *lptr,int *flags)
   else
     litadd(0);          /* add full cell of zeros */
 
-  if (*lptr==',' || *lptr==')' || *lptr=='}' || *lptr==';')
+  if (*lptr==',' || *lptr==')' || *lptr=='}' || *lptr==';' || *lptr=='\n' || *lptr=='\r')
     lptr=stringize;						/* backtrack to end of last string for closing " */
   return lptr;
 }