change go version

.travis.yml

@@ -50,6 +50,7 @@ before_install:
   # protobuf version.
   - pip install numpy wheel 'protobuf==3.1' sphinx==1.5.6 recommonmark sphinx-rtd-theme==0.1.9 virtualenv pre-commit requests==2.9.2 LinkChecker
   - pip install rarfile
+  - eval "$(GIMME_GO_VERSION=1.8.3 gimme)"
   - |
     function timeout() { perl -e 'alarm shift; exec @ARGV' "$@"; }
 script:

go/pserver/cclient/test/test_cclient.c

@@ -20,7 +20,8 @@ void print_parameter(paddle_gradient* param) {
     printf("name: %s\n", param->name);
     printf("content_len: %d\n", param->content_len);
     printf("content_type: %d\n", param->element_type);
-    for (int i = 0; i < param->content_len / sizeof(real); ++i) {
+    int i;
+    for (i = 0; i < param->content_len / sizeof(real); ++i) {
       printf("%f ", ((float*)param->content)[i]);
     }
     printf("\n\n");

go/pserver/optimizer.c

@@ -36,7 +36,8 @@ int update_SGD(void* optimizer,
   float* parameter = (float*)buffer;
   float* grad = (float*)gradient;
 
-  for (int i = 0; i < num_bytes / sizeof(float); ++i) {
+  int i;
+  for (i = 0; i < num_bytes / sizeof(float); ++i) {
     parameter[i] -= o->learning_rate * grad[i];
   }
   return 0;