Fix handshake status not being set if increase_bm_data_size fails

Also set warning level to -Wall
esp8266/Arduino#1708

Author: igrr

Makefile

@@ -40,7 +40,7 @@ LDFLAGS  += 	-L$(XTENSA_LIBS)/lib \
 
 CFLAGS+=-std=c99 -DESP8266
 
-CFLAGS += -Os -g -O2 -Wpointer-arith -Wno-implicit-function-declaration -Wl,-EL -fno-inline-functions -nostdlib -mlongcalls -mno-text-section-literals  -D__ets__ -DICACHE_FLASH
+CFLAGS += -Wall -Os -g -O2 -Wpointer-arith -Wno-implicit-function-declaration -Wl,-EL -fno-inline-functions -nostdlib -mlongcalls -mno-text-section-literals  -D__ets__ -DICACHE_FLASH
 BIN_DIR := bin
 AXTLS_AR := $(BIN_DIR)/libaxtls.a
 

ssl/tls1.c

@@ -1415,16 +1415,16 @@ int increase_bm_data_size(SSL *ssl)
         ssl->max_plain_length == RT_MAX_PLAIN_LENGTH) {
         return SSL_OK;
     }
-    ssl->can_increase_data_size = false;
     certificate_free(ssl);
     free(ssl->bm_all_data);
     ssl->bm_data = 0;
     ssl->bm_all_data = malloc(RT_MAX_PLAIN_LENGTH + RT_EXTRA);
     if (!ssl->bm_all_data) {
         printf("failed to grow plain buffer\r\n");
-        ssl->hs_status == SSL_ERROR_DEAD;
+        ssl->hs_status = SSL_ERROR_DEAD;
         return SSL_ERROR_CONN_LOST;
     }
+    ssl->can_increase_data_size = false;
     ssl->max_plain_length = RT_MAX_PLAIN_LENGTH;
     ssl->bm_data = ssl->bm_all_data + BM_RECORD_OFFSET;
     return SSL_OK;