Add support for single in idl files.

tools/widl/parser.l

@@ -285,6 +285,7 @@ static struct keyword {
 /* ... */
 	{"short",			tSHORT},
 	{"signed",			tSIGNED},
+	{"single",			tSINGLE},
 	{"size_is",			tSIZEIS},
 	{"sizeof",			tSIZEOF},
 /* ... */

tools/widl/parser.y

@@ -170,6 +170,7 @@ static type_t std_uhyper = { "MIDL_uhyper" };
 %token tRETVAL
 %token tSHORT
 %token tSIGNED
+%token tSINGLE
 %token tSIZEIS tSIZEOF
 %token tSOURCE
 %token tSTDCALL
@@ -565,6 +566,7 @@ base_type: tBYTE				{ $$ = make_type(RPC_FC_BYTE, NULL); }
 						}
 	| tUNSIGNED				{ $$ = make_type(RPC_FC_ULONG, &std_int); $$->sign = -1; }
 	| tFLOAT				{ $$ = make_type(RPC_FC_FLOAT, NULL); }
+	| tSINGLE				{ $$ = make_type(RPC_FC_FLOAT, NULL); }
 	| tDOUBLE				{ $$ = make_type(RPC_FC_DOUBLE, NULL); }
 	| tBOOLEAN				{ $$ = make_type(RPC_FC_BYTE, &std_bool); /* ? */ }
 	| tERRORSTATUST				{ $$ = make_type(RPC_FC_ERROR_STATUS_T, NULL); }