fix void param declarations & prototypes

These should be funcname(void) rather than funcname(). Found by
searching for "() {" in C files.

Bug: aomedia:3416
Change-Id: I119133dc0fe78cfb24f072da70ca4ceea8e19431
diff --git a/tools/auto_refactor/c_files/decl_status_code.c b/tools/auto_refactor/c_files/decl_status_code.c
index bd445ab..a444553 100644
--- a/tools/auto_refactor/c_files/decl_status_code.c
+++ b/tools/auto_refactor/c_files/decl_status_code.c
@@ -13,17 +13,17 @@
   int x;
 } T1;
 
-int parse_decl_node_2() { int arr[3]; }
+int parse_decl_node_2(void) { int arr[3]; }
 
-int parse_decl_node_3() { int *a; }
+int parse_decl_node_3(void) { int *a; }
 
-int parse_decl_node_4() { T1 t1[3]; }
+int parse_decl_node_4(void) { T1 t1[3]; }
 
-int parse_decl_node_5() { T1 *t2[3]; }
+int parse_decl_node_5(void) { T1 *t2[3]; }
 
-int parse_decl_node_6() { T1 t3[3][3]; }
+int parse_decl_node_6(void) { T1 t3[3][3]; }
 
-int main() {
+int main(void) {
   int a;
   T1 t1;
   struct S1 s1;
diff --git a/tools/auto_refactor/c_files/func_in_out.c b/tools/auto_refactor/c_files/func_in_out.c
index 67ab58d..7f37bba 100644
--- a/tools/auto_refactor/c_files/func_in_out.c
+++ b/tools/auto_refactor/c_files/func_in_out.c
@@ -199,7 +199,7 @@
   for (int i = 0; i < 10; ++i) cpi->y--;
 }
 
-int main() {
+int main(void) {
   int x;
   VP9_COMP cpi;
   RD rd;
diff --git a/tools/auto_refactor/c_files/parse_lvalue.c b/tools/auto_refactor/c_files/parse_lvalue.c
index 97113ef..fa44d72 100644
--- a/tools/auto_refactor/c_files/parse_lvalue.c
+++ b/tools/auto_refactor/c_files/parse_lvalue.c
@@ -39,7 +39,7 @@
   return 0;
 }
 
-int main() {
+int main(void) {
   int x = 0;
   VP9_COMP cpi;
   func(&cpi, x);
diff --git a/tools/auto_refactor/c_files/simple_code.c b/tools/auto_refactor/c_files/simple_code.c
index dd89a15..902cd1d 100644
--- a/tools/auto_refactor/c_files/simple_code.c
+++ b/tools/auto_refactor/c_files/simple_code.c
@@ -48,11 +48,11 @@
   c(1);
   return 0;
 }
-int e() {
+int e(void) {
   c(0);
   return 0;
 }
-int main() {
+int main(void) {
   int p = 3;
   S s;
   s.x = p + 1;
diff --git a/tools/auto_refactor/c_files/struct_code.c b/tools/auto_refactor/c_files/struct_code.c
index e14372c..7f24d41 100644
--- a/tools/auto_refactor/c_files/struct_code.c
+++ b/tools/auto_refactor/c_files/struct_code.c
@@ -46,4 +46,4 @@
   } z;
 } T7;
 
-int main() {}
+int main(void) {}