Validate input to C2CPlan::c2c and R2RPlan::r2r

The underlying C function requires that the arrays passed into it have the same length and alignment as was used to create the plan.
Adding this check prevents out-of-bounds reads and possibly writes.

The same check is already in place for C2R and R2C plans.

Fixes: 3e84ddd
Fixes: 862fead

Author: LingMan

fftw/src/plan.rs

@@ -202,6 +202,7 @@ macro_rules! impl_c2c {
                 })
             }
             fn c2c(&mut self, in_: &mut [Self::Complex], out: &mut [Self::Complex]) -> Result<()> {
+                self.check(in_, out)?;
                 unsafe { $exec(self.plan, in_.as_mut_ptr(), out.as_mut_ptr()) };
                 Ok(())
             }
@@ -315,6 +316,7 @@ macro_rules! impl_r2r {
                 })
             }
             fn r2r(&mut self, in_: &mut [Self::Real], out: &mut [Self::Real]) -> Result<()> {
+                self.check(in_, out)?;
                 unsafe { $exec(self.plan, in_.as_mut_ptr(), out.as_mut_ptr()) };
                 Ok(())
             }