Add sys/lint.sh and run it in the CI ##refactor

.github/workflows/ci.yml

@@ -44,6 +44,8 @@ jobs:
     steps:
     - name: Checkout
       uses: actions/checkout@v2
+    - name: Linting
+      run: sys/lint.sh
     - name: Building without capstone
       run: |
         cp -f dist/plugins-cfg/plugins.nocs.cfg plugins.cfg

libr/core/disasm.c

@@ -5533,7 +5533,8 @@ R_API int r_core_print_disasm(RCore *core, ut64 addr, ut8 *buf, int len, int cou
 		if (p) {
 			core->asmqjmps_size = R_CORE_ASMQJMPS_NUM;
 			core->asmqjmps = p;
-			for (int i = 0; i < R_CORE_ASMQJMPS_NUM; i++) {
+			int i;
+			for (i = 0; i < R_CORE_ASMQJMPS_NUM; i++) {
 				core->asmqjmps[i] = UT64_MAX;
 			}
 		}

libr/main/ravc2.c

@@ -135,7 +135,8 @@ R_API int r_main_ravc2(int argc, const char **argv) {
 		if (message) {
 			RList *files = r_list_new();
 			if (files) {
-				for (size_t i = 2; i < argc - 1; i++) {
+				size_t i;
+				for (i = 2; i < argc - 1; i++) {
 					char *file = r_str_new(argv[opt.ind + i]);
 					if (!file || !r_list_append (files, file)) {
 						free (message);

sys/lint.sh

@@ -0,0 +1,9 @@
+#!/bin/sh
+
+(git grep 'for (int' | grep -v sys/) && exit 1
+(git grep 'for (long' | grep -v sys/) && exit 1
+(git grep 'for (size_t' | grep -v sys/) && exit 1
+
+(git grep 'R_LOG_' | grep '\\n' | grep -v sys/) ## && exit 1
+
+exit 0