binding size fix (#7177)

Author: minus1ms

wgpu-hal/src/auxil/mod.rs

@@ -53,7 +53,7 @@ pub mod db {
 /// Interestingly, the index itself can't reach that high, because the minimum
 /// element size is 4 bytes, but the compiler toolchain still computes the
 /// offset at some intermediate point, internally, as i32.
-pub const MAX_I32_BINDING_SIZE: u32 = 1 << 31;
+pub const MAX_I32_BINDING_SIZE: u32 = (1 << 31) - 1;
 
 pub fn map_naga_stage(stage: naga::ShaderStage) -> wgt::ShaderStages {
     match stage {