Fixed messages (log_error and log_info don't support varargs) (replaying 4f69c90a)

example/main.cpp

@@ -690,7 +690,7 @@ cl_device_type getGlobalDeviceType()
 void 
 notify_callback(const char *errinfo, const void *private_info, size_t cb, void *user_data)
 {
-    log_error( "%s\n", errinfo );
+    printf( "ERROR: %s\n", errinfo );
 }
 
 int
@@ -771,7 +771,7 @@ int main (int argc, char * const argv[]) {
 	        cl_bool available;
 	        err = clGetDeviceInfo(device_ids[i], CL_DEVICE_AVAILABLE, sizeof(cl_bool), &available, NULL);
 	        if(err) {
-	            log_error("Cannot check device availability of device # %d. Continuing with next available device...\n", i);
+	            printf("ERROR: Cannot check device availability of device # %d. Continuing with next available device...\n", i);
 	            continue;
 	        }
 
@@ -783,10 +783,10 @@ int main (int argc, char * const argv[]) {
 	            char name[200];
 	            err = clGetDeviceInfo(device_ids[i], CL_DEVICE_NAME, sizeof(name), name, NULL);
 	            if(err == CL_SUCCESS) {
-	                log_info("Device %s not available for compute\n", name);
+	                printf("INFO: Device %s not available for compute\n", name);
 	            }
 	            else {
-	                log_info("Device # %d not available for compute\n", i);
+	                printf("INFO: Device # %d not available for compute\n", i);
 	            }
 	        }
 	    }