Declaration grouping uses () rather than {}; Fix some problem with compilation on *nix

core/hash.odin

@@ -46,17 +46,17 @@ proc fnv64a(data: []u8) -> u64 {
 }
 
 proc murmur32(data: []u8) -> u32 {
-	const {
+	const (
 		c1_32: u32 = 0xcc9e2d51;
 		c2_32: u32 = 0x1b873593;
-	}
+	)
 
-	var {
+	var (
 		h1: u32 = 0;
 		nblocks = len(data)/4;
 		p = &data[0];
 		p1 = p + 4*nblocks;
-	}
+	)
 
 	for ; p < p1; p += 4 {
 		var k1 = ^u32(p)^;
@@ -102,10 +102,10 @@ proc murmur64(data: []u8) -> u64 {
 	const SEED = 0x9747b28c;
 
 	when size_of(int) == 8 {
-		const {
+		const (
 			m = 0xc6a4a7935bd1e995;
 			r = 47;
-		}
+		)
 
 		var h: u64 = SEED ~ (u64(len(data)) * m);
 		var data64 = slice_ptr(^u64(&data[0]), len(data)/size_of(u64));
@@ -139,18 +139,18 @@ proc murmur64(data: []u8) -> u64 {
 
 		return h;
 	} else {
-		const {
+		const (
 			m = 0x5bd1e995;
 			r = 24;
-		}
+		)
 
-		var {
+		var (
 			h1 = u32(SEED) ~ u32(len(data));
 			h2 = u32(SEED) >> 32;
 			data32 = slice_ptr(^u32(&data[0]), len(data)/size_of(u32));
 			len = len(data);
 			i = 0;
-		}
+		)
 
 		for len >= 8 {
 			var k1, k2: u32;