Merge branch 'bugfix/small_fixes_jd' into 'master'

Some small fixes

- Kill unused uxReturn in task.c,  https://github.com/espressif/esp-idf/issues/48
- Line end conversion in gpio.c
- Move heap_alloc_caps.h so components can also use it

See merge request !135

components/esp32/heap_alloc_caps.c

@@ -15,7 +15,7 @@
 
 #include <freertos/heap_regions.h>
 
-#include "heap_alloc_caps.h"
+#include "esp_heap_alloc_caps.h"
 #include "spiram.h"
 #include "esp_log.h"
 

components/esp32/include/heap_alloc_caps.h

@@ -0,0 +1,34 @@
+// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+#ifndef HEAP_ALLOC_CAPS_H
+#define HEAP_ALLOC_CAPS_H
+
+#define MALLOC_CAP_EXEC				(1<<0)	//Memory must be able to run executable code
+#define MALLOC_CAP_32BIT			(1<<1)	//Memory must allow for aligned 32-bit data accesses
+#define MALLOC_CAP_8BIT				(1<<2)	//Memory must allow for 8/16/...-bit data accesses
+#define MALLOC_CAP_DMA				(1<<3)	//Memory must be able to accessed by DMA
+#define MALLOC_CAP_PID2				(1<<4)	//Memory must be mapped to PID2 memory space
+#define MALLOC_CAP_PID3				(1<<5)	//Memory must be mapped to PID3 memory space
+#define MALLOC_CAP_PID4				(1<<6)	//Memory must be mapped to PID4 memory space
+#define MALLOC_CAP_PID5				(1<<7)	//Memory must be mapped to PID5 memory space
+#define MALLOC_CAP_PID6				(1<<8)	//Memory must be mapped to PID6 memory space
+#define MALLOC_CAP_PID7				(1<<9)	//Memory must be mapped to PID7 memory space
+#define MALLOC_CAP_SPISRAM			(1<<10)	//Memory must be in SPI SRAM
+#define MALLOC_CAP_INVALID			(1<<31)	//Memory can't be used / list end marker
+
+
+void heap_alloc_caps_init();
+void *pvPortMallocCaps(size_t xWantedSize, uint32_t caps);
+
+#endif

components/freertos/tasks.c

@@ -3342,7 +3342,6 @@ TCB_t *pxNewTCB;
 BaseType_t xTaskGetAffinity( TaskHandle_t xTask )
 {
 	TCB_t *pxTCB;
-	UBaseType_t uxReturn;
 
 	pxTCB = prvGetTCBFromHandle( xTask );