Merge pull request #159 from practicalswift/crash-31-x64-layout-bookkeeping-error.c

Add crash case crash-31-x64-layout-bookkeeping-error.c

suite/regress/c-crashers/crash-31-x64-layout-bookkeeping-error.c

+#include <keystone/keystone.h>
+int main(int argc, char **argv) {
+  int ks_arch = KS_ARCH_X86, ks_mode = KS_MODE_64;
+  char *assembly = ".=x;.=x";
+  ks_engine *ks;
+  ks_err err = ks_open(ks_arch, ks_mode, &ks);
+  if (!err) {
+    size_t count, size;
+    unsigned char *insn;
+    ks_asm(ks, assembly, 0, &insn, &size, &count);
+    ks_free(insn);
+  }
+  ks_close(ks);
+}