Fix issue #829 "Compiler crashes when declaring maps with procedure"

Inits `o->value` in `check_expr_base_internal()` so doesn't accidentally
  use last (the proc lit was being set to that of previous string)
Adds test to "tests/issues" and changes CI to use new "run" shells

tests/issues/run.bat

@@ -0,0 +1,17 @@
+@echo off
+
+if not exist "tests\issues\build\" mkdir tests\issues\build
+
+set COMMON=-collection:tests=tests -out:tests\issues\build\test_issue
+
+@echo on
+
+.\odin build tests\issues\test_issue_829.odin %COMMON%
+tests\issues\build\test_issue
+
+.\odin build tests\issues\test_issue_1592.odin %COMMON%
+tests\issues\build\test_issue
+
+@echo off
+
+rmdir /S /Q tests\issues\build

tests/issues/run.sh

@@ -0,0 +1,18 @@
+#!/bin/bash
+set -eu
+
+mkdir -p tests/issues/build
+
+COMMON="-collection:tests=tests -out:tests/issues/build/test_issue"
+
+set -x
+
+./odin build tests/issues/test_issue_829.odin $COMMON
+tests/issues/build/test_issue
+
+./odin build tests/issues/test_issue_1592.odin $COMMON
+tests/issues/build/test_issue
+
+set +x
+
+rm -rf tests/issues/build

tests/issues/test_issue_829.odin

@@ -0,0 +1,33 @@
+// Tests issue #829 https://github.com/odin-lang/Odin/issues/829
+package test_issues
+
+import "core:fmt"
+import "core:testing"
+import tc "tests:common"
+
+/* Original issue #829 example */
+
+env : map[string]proc(a, b : int) -> int = {
+	"+" = proc(a, b : int) -> int {
+		return a + b
+	},
+}
+
+test_orig :: proc() {
+	fmt.println(env["+"](1, 2))
+}
+
+main :: proc() {
+	t := testing.T{}
+
+	test_orig()
+
+	test_orig_ret(&t)
+
+	tc.report(&t)
+}
+
+test_orig_ret :: proc(t: ^testing.T) {
+	r := fmt.tprint(env["+"](1, 2))
+	tc.expect(t, r == "3", fmt.tprintf("%s: \"%s\" != \"3\"\n", #procedure, r))
+}