Merge pull request #155 from practicalswift/invalid-scale

Add crash case triggering "Invalid scale!" assertion failure.

suite/regress/c-crashers/Makefile

-CFLAGS = -Wall
+CFLAGS = -Wall -Werror -std=c99 -pedantic
 LDLIBS = -l$(LIBNAME)
 LIBNAME = keystone
 PROGS = $(patsubst %.c, %, $(wildcard crash-??-*.c))

suite/regress/c-crashers/crash-29-x64-invalid-scale.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*mm0";
+  ks_engine *ks;
+  ks_err err = ks_open(ks_arch, ks_mode, &ks);
+  if (!err) {
+    size_t count, size;
+    unsigned char *insn;
+    if (ks_asm(ks, assembly, 0, &insn, &size, &count))
+      printf("ERROR: failed on ks_asm() with error = %s, code = %u\n", ks_strerror(ks_errno(ks)), ks_errno(ks));
+    ks_free(insn);
+  }
+  ks_close(ks);
+}