Added null-termination for kernel build log.

ocl.c

@@ -619,8 +619,9 @@ build:
 		size_t log_size;
 		status = clGetProgramBuildInfo(clState->program, devices[gpu], CL_PROGRAM_BUILD_LOG, 0, NULL, &log_size);
 
-		char *sz_log = (char *)malloc(log_size);
+		char *sz_log = (char *)malloc(log_size + 1);
 		status = clGetProgramBuildInfo(clState->program, devices[gpu], CL_PROGRAM_BUILD_LOG, log_size, sz_log, NULL);
+		sz_log[log_size] = '\0';
 		applog(LOG_ERR, "%s", sz_log);
 		free(sz_log);
 		goto not_built;
@@ -756,8 +757,9 @@ built:
 			size_t log_size;
 			status = clGetProgramBuildInfo(clState->program, devices[gpu], CL_PROGRAM_BUILD_LOG, 0, NULL, &log_size);
 
-			char *sz_log = (char *)malloc(log_size);
+			char *sz_log = (char *)malloc(log_size + 1);
 			status = clGetProgramBuildInfo(clState->program, devices[gpu], CL_PROGRAM_BUILD_LOG, log_size, sz_log, NULL);
+			sz_log[log_size] = '\0';
 			applog(LOG_ERR, "%s", sz_log);
 			free(sz_log);
 			return NULL;