Fix parsing error with C-style comments.

This is similar to the bug fixed in 5ec3bc9.

Author: bgrainger

src/MySqlConnector/Core/SqlParser.cs

@@ -218,7 +218,10 @@ public void Parse(string sql)
 						state = State.Hyphen;
 					}
 					else if (ch == '/' && index < sql.Length - 1 && sql[index + 1] == '*')
+					{
+						beforeCommentState = state;
 						state = State.ForwardSlash;
+					}
 					else if (ch == '\'')
 						state = State.SingleQuotedString;
 					else if (ch == '"')

tests/MySqlConnector.Tests/StatementPreparerTests.cs

@@ -16,6 +16,8 @@ public class StatementPreparerTests
 		[InlineData("SELECT Id\nFROM mytable\nWHERE column1 = 2  -- mycomment\nAND column2 = @param")]
 		[InlineData("SELECT Id\nFROM mytable\nWHERE column1 = 2 -- mycomment\nAND column2 = @param")]
 		[InlineData("SELECT Id\nFROM mytable\nWHERE column1 = 2 -- mycomment\n  AND column2 = @param")]
+		[InlineData("SELECT Id\nFROM mytable\nWHERE column1 = 2 /* mycomment */\n  AND column2 = @param")]
+		[InlineData("SELECT Id\nFROM mytable\nWHERE column1 = 2 /* mycomment */ AND column2 = @param")]
 		public void Bug429(string sql)
 		{
 			var parameters = new MySqlParameterCollection();